@article{reisig_huseth_2025, title={Establishing an IPM System for Tarnished Plant Bug (Hemiptera: Miridae) in North Carolina}, url={https://doi.org/10.3390/insects16020164}, DOI={10.3390/insects16020164}, journal={Insects}, author={Reisig, Dominic and Huseth, Anders}, year={2025}, month={Feb} } @article{reisig_huseth_2025, title={Establishing best practices for insect resistance management: a new paradigm for genetically engineered toxins in cotton expressing Mpp51Aa2}, volume={1}, ISSN={["1938-291X"]}, url={https://doi.org/10.1093/jee/toae312}, DOI={10.1093/jee/toae312}, abstractNote={Abstract Debate over resistance management tactics for genetically engineered (GE) crops expressing insecticidal toxins is not new. For several decades, researchers, regulators, and agricultural industry scientists have developed strategies to limit the evolution of resistance in populations of lepidopteran and coleopteran pests. A key attribute of many of these events was insecticide resistance management (IRM) strategies designed around a presumed high-dose expression sufficient to kill 99.5% of exposed larvae for some of the main target pests in corn, Zea mays L. and cotton, Gossypium hirsutum L. In contrast, other target pests did not meet this high-dose criterion. Similarly, the recent release of ThryvOn cotton that expresses thysanopteran and hemipteran active Mpp51Aa2.834_16 toxin is not high dose, working on a combination of behavioral and sublethal effects to suppress populations. This unique mode of control has generated considerable uncertainty about what IRM strategies will be most effective to limit field-evolved resistance to this unique spectrum of pests. The goal of this manuscript is to present several knowledge gaps that exist in proposed Mpp51Aa2 IRM plans, focusing on its activity on thrips, Frankliniella spp. Addressing these gaps will be crucial to limit resistance and preserve the benefits that this technology may provide by alleviating reliance on conventional insecticides and seed treatments. Broadly, these considerations will be important for future GE events that are non-high dose but remain valuable components of a more holistic insect management programs that integrate multiple tactics to reduce conventional insecticide use for challenging pests.}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Reisig, Dominic and Huseth, Anders}, editor={Gassmann, AaronEditor}, year={2025}, month={Jan} } @article{wallace_nelson_reisig_huseth_2025, title={Forecasting interannual abundance of Helicoverpa zea (Lepidoptera: Noctuidae)}, volume={2}, ISSN={["1938-2936"]}, url={https://doi.org/10.1093/ee/nvaf011}, DOI={10.1093/ee/nvaf011}, journal={ENVIRONMENTAL ENTOMOLOGY}, author={Wallace, Samuel T. and Nelson, Natalie G. and Reisig, Dominic D. and Huseth, Anders S.}, editor={Wetzel, WilliamEditor}, year={2025}, month={Feb} } @article{farmer_gore_catchot jr_crow_cook_pieralisi_towles_brown_stewart_reisig_et al._2025, title={The influence of imidacloprid seed treatment on non-ThryvOn and ThryvOn cotton}, volume={1}, ISSN={["1938-291X"]}, url={https://doi.org/10.1093/jee/toaf010}, DOI={10.1093/jee/toaf010}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Farmer, Walker Brett and Gore, Jeffrey and Catchot Jr, Angus L. and Crow, Whitney D. and Cook, Don and Pieralisi, Brian K. and Towles, Tyler and Brown, Sebe and Stewart, Scott and Reisig, Dominic and et al.}, editor={Taylor, SallyEditor}, year={2025}, month={Jan} } @article{stahr_lytle_avila_huseth_bertone_quesada-ocampo_2024, title={Drosophila hydei as a Potential Vector of Ceratocystis fimbriata, the Causal Agent of Sweetpotato Black Rot, in Storage Facilities}, volume={7}, ISSN={["1943-7684"]}, url={https://doi.org/10.1094/PHYTO-09-23-0328-R}, DOI={10.1094/PHYTO-09-23-0328-R}, abstractNote={, the causal agent of sweetpotato black rot, is a pathogen capable of developing and spreading within postharvest settings. A survey of North Carolina sweetpotato storage facilities was conducted to determine the arthropods present and identify potential vectors of}, journal={PHYTOPATHOLOGY}, author={Stahr, Madison and Lytle, Amanda and Avila, Kelly and Huseth, Anders S. and Bertone, Mathew and Quesada-Ocampo, Lina M.}, year={2024}, month={Jul} } @article{schoeppner_vann_ackerman_cheek_huseth_2024, title={Evaluation of transplant drench and foliar insecticide applications for wireworm (Coleoptera: Elateridae) management in sweetpotato}, volume={10}, ISSN={["1938-291X"]}, url={https://doi.org/10.1093/jee/toae216}, DOI={10.1093/jee/toae216}, abstractNote={Abstract The revocation of chlorpyrifos tolerances in 2022 left sweetpotato growers without their most important tool to combat a complex of soil-borne root pests that includes wireworms (Coleoptera: Elateridae). Since then, growers have reported increased root damage despite a rapid pivot to pyrethroid-based management systems to replace mechanically incorporated preplant chlorpyrifos broadcast sprays. Our goal was to evaluate the efficacy of alternative insecticide chemistries and application methods to expand the portfolio of management options for wireworms, specifically Conoderus spp. and Melanotus communis (Gyllenhal). We tested (i) insecticidal transplant water drenches and (ii) a foliar spray program targeting adult elaterids. We found that incorporating insecticides into transplant water reduced wireworm damage when compared to untreated transplant water. Our treatments included a recently registered meta-diamide, broflanilide, which represents a promising path to diversify active ingredients and shift away from an overreliance on preplant and post-directed pyrethroid soil sprays. Foliar spray plots had less damage than plots that did not receive foliar sprays. One benefit of adult-focused management is the availability of effective monitoring tools such as sex pheromones and blacklight trapping. Developing a robust adult monitoring program would enable more precise applications of foliar insecticides versus season-long prophylactic soil sprays targeting larvae. Our results demonstrated a significant benefit to both alternative delivery methods. These management alternatives could expand treatment options beyond traditional preplant and post-directed pyrethroid sprays.}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Schoeppner, Emma and Vann, Matthew and Ackerman, Renee and Cheek, Joseph A. and Huseth, Anders S.}, editor={Beuzelin, JulienEditor}, year={2024}, month={Oct} } @article{millar_williams iii_serrano_mcelrath_zou_grommes-yeager_schoeppner_huseth_kuhar_etzler_et al._2024, title={Identification of sex attractants for 6 North American click beetle species in 4 tribes of the Elateridae}, volume={9}, ISSN={["1938-2936"]}, url={https://doi.org/10.1093/ee/nvae077}, DOI={10.1093/ee/nvae077}, abstractNote={Abstract We describe experiments that evaluated potential sex pheromone components for 6 North American click beetle species. In field trials in Illinois, South Carolina, North Carolina, and Virginia, male beetles of 6 species were strongly attracted to geranyl butyrate (Agriotes insanus Candèze), 5-methylhexyl (Z)-4-decenoate (Elater abruptus Say), 11-dodecenyl butyrate (Melanotus ignobilis Melsheimer), and limoniic acid (Gambrinus griseus [Palisot de Beauvois], G. rudis [Brown], and G. plebejus [Say]). Collection of E. abruptus in South Carolina represents a new state record. For each species, capture rates varied geographically and temporally, possibly due to differences in local population densities and regional phenology, or the efficiency of different trap designs or trap placement. Structural similarities were observed between the tested attractants and previously identified pheromones of closely related species. For example, males of A. insanus were attracted to geranyl butyrate, analogous to the terpenoid ester pheromones of a number of European congeners. The attractant for E. abruptus, 5-methylhexyl (Z)-4-decenoate, is an analog of the pheromone of its European congener E. ferrugineus L., and the attractant for M. ignobilis, 11-dodecenyl butyrate, is an analog of attractants of European and Asian congeners. Attraction of the 3 Gambrinus species to limoniic acid parallels recent reports of attraction of the congeners G. seminudus (Van Dyke) and G. ursinus (Van Dyke) to this compound, which was originally identified from closely related species of Limonius. Full identifications of additional sex pheromones for elaterid species should provide a more complete picture of the diversities/similarities of the semiochemicals mediating reproductive behaviors of this biologically diverse and taxonomically complex group.}, journal={ENVIRONMENTAL ENTOMOLOGY}, author={Millar, Jocelyn G. and Williams III, Livy and Serrano, Jacqueline M. and Mcelrath, Thomas C. and Zou, Yunfan and Grommes-Yeager, Anna C. and Schoeppner, Emma and Huseth, Anders S. and Kuhar, Thomas P. and Etzler, Frank E. and et al.}, editor={Cha, Dong HEditor}, year={2024}, month={Sep} } @article{koebernick_hagan_zaccaron_escalante_jacobson_bowen_strayer-scherer_heilsnis_brown_sikora_et al._2024, title={Monitoring the Distribution, Incidence, and Symptom Expression Associated with Cotton Leafroll Dwarf Virus in the Southern United States Using a Sentinel Plot System}, volume={8}, ISSN={["2690-5442"]}, DOI={10.1094/PHYTOFR-02-24-0008-R}, abstractNote={Cotton leafroll dwarf virus (CLRDV), transmitted by the cotton aphid ( Aphis gossypii Glover), was first confirmed in upland cotton ( Gossypium hirsutum L.) in Alabama, U.S.A., in 2017. Subsequent observations of symptomatic plants followed by virus infection confirmation via reverse transcriptase PCR (RT-PCR) were made in neighboring states in 2018. To assess the distribution and incidence of CLRDV and the occurrence of presumed symptoms across the southern cotton belt, a multidisciplinary team established sentinel plot survey sites at 16 experiment stations in 11 states stretching from Texas to Virginia and Tennessee to Florida beginning in 2019. Field trials were conducted over a 3-year period using multiple cotton cultivars that were adjusted annually. Cotton plots were evaluated at each location by a single evaluator to attempt to correlate symptom occurrence across the cotton-growing region with virus incidence in cotton plant tissues using RT-PCR. Symptom incidence, based on visual estimation of plants in each plot with presumed symptoms, differed across the region and ranged from 0 to 75%, with a low average over all locations of 11.4% in 2021 to an average high of 28.0% in 2020. Though symptom incidence suggested the presence of CLRDV, there were instances where apparent symptoms were observed but virus presence was not confirmed by RT-PCR. CLRDV has since been confirmed from all locations, which suggests that it has become endemic in cotton production areas throughout the eastern range of the United States. [Formula: see text] Copyright © 2024 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .}, journal={PHYTOFRONTIERS}, author={Koebernick, J. C. and Hagan, A. K. and Zaccaron, M. and Escalante, C. and Jacobson, A. L. and Bowen, K. L. and Strayer-Scherer, A. and Heilsnis, B. and Brown, S. and Sikora, E. J. and et al.}, year={2024}, month={Aug} } @article{wong_ye_thiessen_huseth_gorny_quesada-ocampo_2024, title={Occurrence and Distribution of Meloidogyne spp. in Fields Rotated with Sweetpotato and Host Range of a North Carolina Population of Meloidogyne enterolobii}, volume={108}, ISSN={0191-2917 1943-7692}, url={http://dx.doi.org/10.1094/PDIS-08-22-1877-RE}, DOI={10.1094/PDIS-08-22-1877-RE}, abstractNote={Root-knot nematodes (RKNs,}, number={9}, journal={Plant Disease}, publisher={Scientific Societies}, author={Wong, TW. S. and Ye, Weimin and Thiessen, Lindsey D. and Huseth, Anders S. and Gorny, Adrienne and Quesada-Ocampo, Lina M.}, year={2024}, month={Sep}, pages={2855–2864} } @article{possebom_reisig_huseth_vann_2024, title={Vertical distribution and tissue selection of Helicoverpa zea (Lepidoptera: Noctuidae) adult oviposition and neonates on soybean with an indeterminate or determinate growth habit}, url={https://doi.org/10.1093/ee/nvae046}, DOI={10.1093/ee/nvae046}, abstractNote={Abstract Helicoverpa zea (Boddie) is a polyphagous pest that can cause serious damage to crops, including soybeans (Glycine max L.). In soybeans with both determinate and indeterminate growth habits, H. zea larvae are more commonly found on leaves compared to blooms, stems, and pods. Past research demonstrated that H. zea adults tend to oviposit near the upper part of the plant canopy in soybeans with a determinate growth habit. However, ovipositional selection on soybeans with an indeterminate growth habit is unknown. We hypothesized that H. zea would oviposit more uniformly throughout the canopy on indeterminate soybean growth habits due to more diffuse reproductive tissue. We planted field and greenhouse experiments with varieties sharing a similar relative maturity (2 maturity group [MG] 5.2 varieties and 2 MG 5.4/5.5 varieties) but with different growth habits. To test oviposition selection, adult H. zea females were allowed to oviposit under field and caged conditions. We counted the number of H. zea eggs and neonates on each plant tissue type from each of 3 equal parts in the plant canopy: upper, middle, and lower. In both experiments, eggs and neonates were most common on leaves at the top of the plant regardless of soybean growth habit. Consequently, ovipositional selection is likely independent of reproductive tissue availability, and patterns of oviposition through the canopy are similar in growth habits. An improved understanding of H. zea ecology in soybeans relative to indeterminate growth habits may improve recommendations for managing this significant pest of soybean.}, journal={Environmental Entomology}, author={Possebom, Taynara and Reisig, Dominic and Huseth, Anders and Vann, Rachel}, editor={Ginzel, MatthewEditor}, year={2024}, month={Aug} } @article{dively_kuhar_taylor_doughty_holmstrom_gilrein_nault_ingerson-mahar_huseth_reisig_et al._2023, title={Extended Sentinel Monitoring of Helicoverpa zea Resistance to Cry and Vip3Aa Toxins in Bt Sweet Corn: Assessing Changes in Phenotypic and Allele Frequencies of Resistance}, volume={14}, ISSN={2075-4450}, url={http://dx.doi.org/10.3390/insects14070577}, DOI={10.3390/insects14070577}, abstractNote={Transgenic corn and cotton that produce Cry and Vip3Aa toxins derived from Bacillus thuringiensis (Bt) are widely planted in the United States to control lepidopteran pests. The sustainability of these Bt crops is threatened because the corn earworm/bollworm, Helicoverpa zea (Boddie), is evolving a resistance to these toxins. Using Bt sweet corn as a sentinel plant to monitor the evolution of resistance, collaborators established 146 trials in twenty-five states and five Canadian provinces during 2020–2022. The study evaluated overall changes in the phenotypic frequency of resistance (the ratio of larval densities in Bt ears relative to densities in non-Bt ears) in H. zea populations and the range of resistance allele frequencies for Cry1Ab and Vip3Aa. The results revealed a widespread resistance to Cry1Ab, Cry2Ab2, and Cry1A.105 Cry toxins, with higher numbers of larvae surviving in Bt ears than in non-Bt ears at many trial locations. Depending on assumptions about the inheritance of resistance, allele frequencies for Cry1Ab ranged from 0.465 (dominant resistance) to 0.995 (recessive resistance). Although Vip3Aa provided high control efficacy against H. zea, the results show a notable increase in ear damage and a number of surviving older larvae, particularly at southern locations. Assuming recessive resistance, the estimated resistance allele frequencies for Vip3Aa ranged from 0.115 in the Gulf states to 0.032 at more northern locations. These findings indicate that better resistance management practices are urgently needed to sustain efficacy the of corn and cotton that produce Vip3Aa.}, number={7}, journal={Insects}, publisher={MDPI AG}, author={Dively, Galen P. and Kuhar, Tom P. and Taylor, Sally V. and Doughty, Helene and Holmstrom, Kristian and Gilrein, Daniel O. and Nault, Brian A. and Ingerson-Mahar, Joseph and Huseth, Anders and Reisig, Dominic and et al.}, year={2023}, month={Jun}, pages={577} } @article{mathers_heitman_huseth_locke_osmond_woodley_2023, title={No-till imparts yield stability and greater cumulative yield under variable weather conditions in the southeastern USA piedmont}, volume={292}, ISSN={0378-4290}, url={http://dx.doi.org/10.1016/j.fcr.2023.108811}, DOI={10.1016/j.fcr.2023.108811}, abstractNote={With projected increases in global temperatures and changes in regional climate, understanding the impact of soil management choices on yield stability is critical for farmer decision-making and agricultural resiliency. No-till and conservation tillage have had variable yield effects depending on crop and location, requiring long-term system-specific studies to gauge potential benefits. Yield and weather data from a 28-year tillage study in the southeastern U.S. piedmont region were analyzed to determine the effect of various conservation tillage practices on maize and soybean productivity and stability under a variety of growth conditions. Growing seasons were grouped by soil moisture and temperature during crop growth stages, and mean crop yields and yield coefficient of variation for the tillage treatments were calculated within the year clusters. Probability density estimates were also used to predict the likelihood of obtaining yields at low and high percentiles. No-till and conservation tillage increased maize yields 42–93% and no-till decreased coefficient of variation of maize yields when soil moisture was low by 10–32%, but had a less pronounced effect on soybean yields. However, the probability of reaching the 90th yield percentile was greater in no-till than conventional tillage in both maize and soybean, by 15% and 10%, respectively. Yield differentiation occurred early in the study, before there was likely substantial differentiation of soil properties from tillage treatments. Previous reports from the site have likewise indicated little differentiation in soil health between tillage systems over the life of the study. Results suggest that surface residue management may be an important driver of system performance, possibly more so than overall soil health.}, journal={Field Crops Research}, publisher={Elsevier BV}, author={Mathers, Cara and Heitman, Joshua and Huseth, Anders and Locke, Anna and Osmond, Deanna and Woodley, Alexander}, year={2023}, month={Mar}, pages={108811} } @article{schoeppner_millar_kuhar_doughty_cherry_hall_knowles_williams_huseth_2023, title={Optimization of 13-tetradecenyl acetate sex pheromone for trapping Melanotus communis (Coleoptera: Elateridae)}, volume={5}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/toad086}, DOI={10.1093/jee/toad086}, abstractNote={Abstract Corn wireworm, Melanotus communis Gyllenhal (Coleoptera: Elateridae), is an economically important larval pest of root and tuber crops in the United States. Previous work to estimate field-level abundance of M. communis has focused on grain-based larval baits placed in soil. However, this sampling method is labor intensive and may not estimate population size accurately. Recent discovery of the M. communis sex pheromone, 13-tetradecenyl acetate, provides a new method to monitor this pest during the adult stage. Early studies with this pheromone showed that different trapping methods might enhance catch and improve trap servicing. We hypothesized that placing lures on elevated traps would increase M. communis capture relative to the in-ground pitfall trapping that is currently used. We had 2 objectives for this study: (a) to compare pheromone captures among in-ground pitfall traps, on-ground pitfalls, elevated pitfalls (1 m), or elevated sticky cards (1 m) and (b) test lure longevity by aging the lures outdoors at 8-, 6-, 4-, 2-, and 0-wk intervals prior to trap deployment in the field. Experiments were conducted in North Carolina, Virginia, South Carolina, and Florida during the 2021 and 2022 field seasons. Results highlight large variation in M. communis abundance across the 4 states. We showed that 1 m elevated pheromone traps caught the most beetles. The age of the lure prior to deployment had a significant effect on trap catch. The lures that were aged for fewer weeks attracted significantly more beetles, with 0- and 2-wk-old lures capturing the greatest numbers.}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Schoeppner, Emma and Millar, Jocelyn G and Kuhar, Thomas P and Doughty, Hélène and Cherry, Ronald H and Hall, Grace and Knowles, Caitlin G and Williams, Livy, III and Huseth, Anders S}, editor={Puche, HelenaEditor}, year={2023}, month={May} } @article{haber_bekelja_huseth_buntin_musser_bonilla_taylor_wilczek_grettenberger_weber_2023, title={Spotted Cucumber Beetle/Southern Corn Rootworm: Profile of a polyphagous native pest}, volume={14}, url={https://doi.org/10.1093/jipm/pmad016}, DOI={10.1093/jipm/pmad016}, abstractNote={Abstract Spotted cucumber beetle, Diabrotica undecimpunctata (Coleoptera: Chrysomelidae), a North American native leaf beetle species also known as southern corn rootworm (SCRW), is a polyphagous pest of various crops including cucurbits (Cucurbitaceae), corn (Zea mays), soybeans (Glycine max), snap beans (Phaseolus vulgaris), peanut (Arachis hypogaea), and sweetpotato (Ipomoea batatas). Larvae are below-ground pests of corn, sorghum (Sorghum spp.), peanut, and sweetpotato. Adult damage impacts cucurbits by damage to seedlings and fruit and transmission of bacterial wilt (causal agent Erwinia tracheiphila) by eastern populations. Adult feeding also damages fresh market beans and occasionally leafy and fruiting vegetables. Damage on many other crops such as field soybeans, dry beans, and sorghum, is often cosmetic and/or inconsequential. Adults overwinter in mild climates and spread seasonally northward, with multiple generations and populations increasing into the late summer. Diverse natural enemies attack all stages, but their ecology and impact are poorly known, particularly below ground. A female-produced sex pheromone and floral volatiles are known attractants, and cucurbitacins (bitter phytochemicals) are feeding stimulants, offering potential selective behavioral control. Management practices are directed against pest complexes, including other below- and above-ground pests, depending on the crop. Chemical controls are soil-applied for protection from root-feeding larvae, systemic seed treatments for early-state crop feeding, and broadcast application in fruiting cucurbits and beans. Action thresholds and monitoring are not well developed. Cultural controls include field and cultivar choice, row covers in high-value crops, and available crop resistance. The wide host range, abundance, and mobility of adults make prediction and monitoring challenging.}, number={1}, journal={Journal of Integrated Pest Management}, author={Haber, A.I. and Bekelja, K. and Huseth, A.S. and Buntin, G.D. and Musser, F. and Bonilla, J.P.R. and Taylor, S.V. and Wilczek, D. and Grettenberger, I.M. and Weber, D.C.}, editor={Kuhar, ThomasEditor}, year={2023}, pages={1–18} } @article{reynolds_williams_martin_readling_ahmmed_huseth_bozkurt_2022, title={A Multimodal Sensing Platform for Interdisciplinary Research in Agrarian Environments}, volume={22}, ISSN={["1424-8220"]}, url={https://www.mdpi.com/1424-8220/22/15/5582}, DOI={10.3390/s22155582}, abstractNote={Agricultural and environmental monitoring programs often require labor-intensive inputs and substantial costs to manually gather data from remote field locations. Recent advances in the Internet of Things enable the construction of wireless sensor systems to automate these remote monitoring efforts. This paper presents the design of a modular system to serve as a research platform for outdoor sensor development and deployment. The advantages of this system include low power consumption (enabling solar charging), the use of commercially available electronic parts for lower-cost and scaled up deployments, and the flexibility to include internal electronics and external sensors, allowing novel applications. In addition to tracking environmental parameters, the modularity of this system brings the capability to measure other non-traditional elements. This capability is demonstrated with two different agri- and aquacultural field applications: tracking moth phenology and monitoring bivalve gaping. Collection of these signals in conjunction with environmental parameters could provide a holistic and context-aware data analysis. Preliminary experiments generated promising results, demonstrating the reliability of the system. Idle power consumption of 27.2 mW and 16.6 mW for the moth- and bivalve-tracking systems, respectively, coupled with 2.5 W solar cells allows for indefinite deployment in remote locations.}, number={15}, journal={SENSORS}, author={Reynolds, James and Williams, Evan and Martin, Devon and Readling, Caleb and Ahmmed, Parvez and Huseth, Anders and Bozkurt, Alper}, year={2022}, month={Aug} } @article{millar_williams_serrano_halloran_grommes_huseth_kuhar_hanks_2022, title={A Symmetrical Diester as the Sex Attractant Pheromone of the North American Click Beetle Parallelostethus attenuatus (Say) (Coleoptera: Elateridae)}, volume={48}, ISSN={0098-0331 1573-1561}, url={http://dx.doi.org/10.1007/s10886-022-01360-8}, DOI={10.1007/s10886-022-01360-8}, abstractNote={Hexanoic acid, 1-octanol, 1,8-octanediol, octyl hexanoate, 1,8-octanediol monohexanoate, and 1,8-octanediol dihexanoate were identified in headspace volatiles collected from the crushed abdomen of a female click beetle of the species Parallelostethus attenuatus (Say) (Elaterinae, tribe Elaterini). In field trials carried out in Illinois, South Carolina, North Carolina, and Virginia, adult male beetles were strongly attracted to 1,8-octanediol dihexanoate alone. Blends of the dihexanoate with one or more of the other compounds proved to be less attractive than the dihexanoate alone, suggesting that the pheromone of this species may consist of a single compound. The symmetrical diester structure of the pheromone is a novel natural product and appears to be structurally unique among insect pheromones.}, number={7-8}, journal={Journal of Chemical Ecology}, publisher={Springer Science and Business Media LLC}, author={Millar, Jocelyn G. and Williams, Livy, III and Serrano, Jacqueline M. and Halloran, Sean and Grommes, Anna C. and Huseth, Anders S. and Kuhar, Thomas P. and Hanks, Lawrence M.}, year={2022}, month={Apr}, pages={598–608} } @article{arends_reisig_gundry_greene_kennedy_reay‐jones_huseth_2022, title={Helicoverpa zea (Lepidoptera: Noctuidae) feeding incidence and survival on Bt maize in relation to maize in the landscape}, volume={78}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.6855}, DOI={10.1002/ps.6855}, abstractNote={AbstractBackgroundCharacterizing Helicoverpa zea (Boddie) damage to maize (Zea mays L.) in relation to the spatiotemporal composition of Bt crops is essential to understand how landscape composition affects H. zea abundance. To examine this relationship, paired Bt (expressing Cry1A.105 + Cry2Ab2) and non‐Bt maize plots were sampled across North and South Carolina during 2017–2019. Kernel damage and larval exit holes were measured following larval development. To understand how maize abundance surrounding sample sites related to feeding damage and larval development, we quantified maize abundance in a 1 km buffer surrounding the sample site and examined the relationship between local maize abundance and kernel damage and larval exit holes.ResultsAcross the years and locations, damage in Bt maize was widespread but significantly lower than in non‐Bt maize, indicating that despite the widespread occurrence of resistance to Cry toxins in maize, Bt maize still provides a measurable reduction in damage. There were negative relationships between kernel injury and ears with larval exit holes in both Bt and non‐Bt maize and the proportion of maize in the landscape during the current year.ConclusionDespite the widespread occurrence of resistance to Cry toxins in maize, this resistance is incomplete, and on average Bt maize continues to provide a measurable reduction in damage. We interpret the negative relationship between abundance of maize within 1 km of the sample location and maize infestation levels, as measured by kernel damage and larval exit holes, to reflect dispersion of the ovipositing moth population over available maize within the local landscape. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.}, number={6}, journal={Pest Management Science}, publisher={Wiley}, author={Arends, Benjamin R. and Reisig, Dominic D. and Gundry, Shawnee and Greene, Jeremy K. and Kennedy, George G. and Reay‐Jones, Francis P.F. and Huseth, Anders S.}, year={2022}, month={Mar}, pages={2309–2315} } @article{schug_reisig_huseth_thrash_vann_2022, title={Helicoverpa zea (Lepidoptera: Noctuidae) Thresholds and Yield Compensation Between Soybeans with Determinate and Indeterminate Growth Habits}, volume={8}, ISSN={["1938-291X"]}, url={https://doi.org/10.1093/jee/toac119}, DOI={10.1093/jee/toac119}, abstractNote={Abstract Soybean (Glycine max L.) is an important row crop in the United States and Helicoverpa zea (Boddie) is one of the most serious insect pests in this system. Economic thresholds for H. zea were developed from soybean varieties with determinate growth habits. However, southern USA farmers have recently planted more soybeans varieties with indeterminate growth habits. Trials were conducted with two determinate and two indeterminate varieties within the same relative maturity group. Levels were compared among groups with differing H. zea pressure (low, medium, high, naturally infested) and manipulated using insecticides. Our objectives were to evaluate yield compensation differences among determinate and indeterminate varieties at these different H. zea pressures and to see if the existing economic threshold should be adjusted between growth habits. Since H. zea larval populations varied across trials, we compared trials with low populations, high populations, and no population. Generally, larval counts did not differ among varieties. We found no yield differences among varieties or between growth habits, regardless of H. zea pressure. In the high population tests, yield was highest in the low population plots, but there was no compensation by the plant in yield components except in number of pods with one seed. In contrast, yield components varied widely across varieties, but these differences were independent of H. zea pressure. These results suggest the economic threshold can be used for determinate and indeterminate growth habits, but more research is needed to confirm this with a larger selection of varieties, planting dates, and maturity groups.}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Schug, Hayden and Reisig, Dominic and Huseth, Anders and Thrash, Ben and Vann, Rachel}, editor={Jabbour, RandaEditor}, year={2022}, month={Aug} } @article{uyi_lahiri_ni_buntin_jacobson_reay-jones_punnuri_huseth_toews_2022, title={Host plant resistance, foliar insecticide application and natural enemies play a role in the management of Melanaphis sorghi (Hemiptera: Aphididae) in grain sorghum}, volume={13}, ISSN={["1664-462X"]}, DOI={10.3389/fpls.2022.1006225}, abstractNote={The invasive Melanaphis sorghi (Theobald; =Melanaphis sacchari Zehntner) is a serious pest of sorghum production in the southern USA. Demonstration of technologies that provide effective control is key to management of this pest. Here, we investigated the effect of host plant resistance (resistant cultivar: DKS37-07 and susceptible cultivar: DKS53-53) and a single foliar insecticide (flupyradifurone: Sivanto Prime) application on M. sorghi infestations and the role of natural enemy populations in grain sorghum production across five locations in four states in southeastern USA. Foliar insecticide application significantly suppressed M. sorghi infestations on both the resistant and susceptible sorghum cultivars across all locations. Planting the host plant resistant cultivar (DKS37-07) significantly reduced aphid infestation across all locations. Plant damage ratings did not vary widely, but there was generally a positive association between aphid counts and observed plant damage, suggesting that increasing aphid numbers resulted in corresponding increase in plant damage. Planting a host plant resistant cultivar and foliar insecticide application generally preserved grain yield. Both sorghum hybrids supported an array of different life stages of natural enemies (predators [lady beetle larvae and adults; hoverfly larvae and lacewing larvae] and parasitoids [a braconid and aphelinid]) for both the sprayed and non-sprayed treatments. We found a strong and significant positive relationship between the natural enemies and the M. sorghi infestation. Results suggest that planting a host plant resistant cultivar and the integration of natural enemies with insecticide control methods in the management of M. sorghi is central to the development of an effective pest management strategy against this invasive pest.}, journal={FRONTIERS IN PLANT SCIENCE}, author={Uyi, Osariyekemwen and Lahiri, Sriyanka and Ni, Xinzhi and Buntin, David and Jacobson, Alana and Reay-Jones, Francis P. F. and Punnuri, Somashekhar and Huseth, Anders S. and Toews, Michael D.}, year={2022}, month={Sep} } @article{mahas_steury_huseth_rogers_jacobson_2022, title={Imidacloprid-resistant Aphis gossypii populations are more common in cotton-dominated landscapes}, volume={11}, ISSN={["1526-4998"]}, url={https://doi.org/10.1002/ps.7274}, DOI={10.1002/ps.7274}, abstractNote={AbstractBACKGROUNDWidespread reports of reduced efficacy of imidacloprid for managing cotton aphids (Aphis gossypii Glover) in cotton (Gossypium hirsutum L.) prompted an investigation to characterize the susceptibility of 43 populations over a 2‐year period. The susceptibility of A. gossypii populations to imidacloprid was examined by calculating LC50 values. Further analyses related resistance assay results to a gradient of cotton production intensity.RESULTSConcentration‐mortality bioassays documencted populations that were 4.26–607.16 times more resistant than the susceptible laboratory population. There was a significant positive relationship between LC50 values and percentage of cotton within 2.5‐ and 5‐km buffers surrounding collection sites. No significant relationship was detected between LC50 values and the percentage of alternative crop and noncrop hosts.CONCLUSIONVariable and high levels of resistance were detected in A. gossypii populations, and this variation was positively associated with cotton production intensity. Cotton is a host that may receive multiple applications of neonicotinoids (via seed treatment and foliar sprays) annually for seedling and mid‐season pests. Rotating modes of action and limiting insecticide use should be implemented to delay the evolution of insecticide resistance in A. gossypii populations. © 2022 Society of Chemical Industry.}, journal={PEST MANAGEMENT SCIENCE}, author={Mahas, John W. and Steury, Todd D. and Huseth, Anders S. and Rogers, Stephanie R and Jacobson, Alana L.}, year={2022}, month={Nov} } @article{lawton_huseth_kennedy_morey_hutchison_reisig_dorman_dillard_venette_groves_et al._2022, title={Pest population dynamics are related to a continental overwintering gradient}, volume={119}, ISSN={0027-8424 1091-6490}, url={http://dx.doi.org/10.1073/pnas.2203230119}, DOI={10.1073/pnas.2203230119}, abstractNote={ Overwintering success is an important determinant of arthropod populations that must be considered as climate change continues to influence the spatiotemporal population dynamics of agricultural pests. Using a long-term monitoring database and biologically relevant overwintering zones, we modeled the annual and seasonal population dynamics of a common pest, Helicoverpa zea (Boddie), based on three overwintering suitability zones throughout North America using four decades of soil temperatures: the southern range (able to persist through winter), transitional zone (uncertain overwintering survivorship), and northern limits (unable to survive winter). Our model indicates H. zea population dynamics are hierarchically structured with continental-level effects that are partitioned into three geographic zones. Seasonal populations were initially detected in the southern range, where they experienced multiple large population peaks. All three zones experienced a final peak between late July (southern range) and mid-August to mid-September (transitional zone and northern limits). The southern range expanded by 3% since 1981 and is projected to increase by twofold by 2099 but the areas of other zones are expected to decrease in the future. These changes suggest larger populations may persist at higher latitudes in the future due to reduced low-temperature lethal events during winter. Because H. zea is a highly migratory pest, predicting when populations accumulate in one region can inform synchronous or lagged population development in other regions. We show the value of combining long-term datasets, remotely sensed data, and laboratory findings to inform forecasting of insect pests. }, number={37}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Lawton, Douglas and Huseth, Anders S. and Kennedy, George G. and Morey, Amy C. and Hutchison, William D. and Reisig, Dominic D. and Dorman, Seth J. and Dillard, DeShae and Venette, Robert C. and Groves, Russell L. and et al.}, year={2022}, month={Sep} } @article{kennedy_huseth_2022, title={Pest species respond differently to farm field size}, volume={119}, ISSN={["1091-6490"]}, url={https://doi.org/10.1073/pnas.2214082119}, DOI={10.1073/pnas.2214082119}, abstractNote={Agriculture faces numerous challenges relating to population growth and environmental quality. Strategies to address these challenges are expected to involve a redesign of agricultural production systems to increase productivity and sustainability (1, 2). Notably, changing how cropland is structured within agroecosystems is one redesign opportunity that could have multiple sustainability benefits. Agroecosystems are a complex arrangement of crop and noncrop habitats that support a diverse array of arthropods relevant to sustainable crop production, including pests, natural enemies, and pollinators. Farmers and ecologists have long known that the arrangement and abundance of crops have local impacts on pest infestations, leading to the idea that manipulation of cropland structure could alleviate pressure by pests, promote biological control, and reduce pesticide use (3–7). One aspect of this is that concentrated crop production, either size of fields planted to a single crop or prevalence of a single crop in the landscape, will result in more pest problems. Rosenheim et al. (8), in PNAS, tested this concept using a large, multicrop dataset collected from different agricultural systems to investigate whether the size of fields planted to a single crop or the amount of a crop in the surrounding landscape is positively related to pest abundance. Their key finding is the absence of a consistent relationship between pest abundance and the area of host crop at either the field or the landscape scale. They found negative, neutral, and positive relationships, suggesting that pests vary in their response to crop abundance at both the field and landscape scales (Fig. 1). The results provide a compelling argument that the relationship between pest pressure and the extent of host crop production is context dependent. This suggests that predicting the effect of crop abundance on the intensity of pest problems will require accounting for the ways in which individual pest species interact with their habitats, as well as the effects of landscape composition and configuration on their natural enemies. The results are important not only because of their relevance to the sustainable intensification of agricultural production systems but also because there has been a longstanding acceptance in the agroecological literature that increasing field size in agricultural monocultures is positively related to pest infestation levels, crop loss, and pesticide use (3, 5, 7, 9). The conceptual framework underlying this putative relationship is based largely on two ecological concepts: the resource concentration hypothesis and the natural enemies hypothesis (10, 11). The former predicts that population densities of specialist herbivores will be higher in large monocultures of their host plants than in diverse stands. The latter suggests reduced biological control of herbivores in large pure stands because these monocultures do not provide suitable habitat and resources for natural enemies. However, the generalization of these concepts to agricultural systems across broad spatial scales and the idea that large-scale monocultures intensify pest problems lacks rigorous theoretical or empirical support (8). Field studies in agricultural crops, primarily involving small plots, as well as studies in natural systems and modeling studies have shown that the effects of increasing field size on pest population density can be inconsistent (12–17). Rosenheim et al. (8) took advantage of existing data compiled by independent crop advisors or farm staff during regular sampling of pest populations or crop injury to inform decisions regarding pesticide applications. The dataset comprised >20,000 field-year observations spanning Fig. 1. The size of arthropod pest populations sampled in different annual and perennial crops were related to the size of the agricultural field and the abundance of the same crop in the surrounding landscape. Results showed that different arthropod species responded positively (pest 1) or negatively (pest 3) or had no relationship at all (pest 2) to the size of agricultural fields. Species tended to have similar trends at different spatial scales of crop production.}, number={39}, journal={PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, author={Kennedy, George G. and Huseth, Anders S.}, year={2022}, month={Sep} } @article{dorman_taylor_malone_roberts_greene_reisig_smith_jacobson_reay-jones_paula-moraes_et al._2022, title={Sampling Optimization and Crop Interface Effects on Lygus lineolaris Populations in Southeastern USA Cotton}, volume={13}, ISSN={2075-4450}, url={http://dx.doi.org/10.3390/insects13010088}, DOI={10.3390/insects13010088}, abstractNote={Tarnished plant bug, Lygus lineolaris (Hemiptera: Miridae), is an economically damaging pest in cotton production systems across the southern United States. We systematically scouted 120 commercial cotton fields across five southeastern states during susceptible growth stages in 2019 and 2020 to investigate sampling optimization and the effect of interface crop and landscape composition on L. lineolaris abundance. Variance component analysis determined field and within-field spatial scales, compared with agricultural district and state, accounted for more variation in L. lineolaris density using sweep net and drop cloth sampling. This result highlights the importance of field-level scouting efforts. Using within-field samples, a fixed-precision sampling plan determined 8 and 23 sampling units were needed to determine L. lineolaris population estimates with 0.25 precision for sweep net (100 sweeps per unit) and drop cloth (1.5 row-m per unit) sampling, respectively. A spatial Bayesian hierarchical model was developed to determine local landscape (<0.5 km from field edges) effects on L. lineolaris in cotton. The proportion of agricultural area and double-crop wheat and soybeans were positively associated with L. lineolaris density, and fields with more contiguous cotton areas negatively predicted L. lineolaris populations. These results will improve L. lineolaris monitoring programs and treatment management decisions in southeastern USA cotton.}, number={1}, journal={Insects}, publisher={MDPI AG}, author={Dorman, Seth J. and Taylor, Sally V. and Malone, Sean and Roberts, Phillip M. and Greene, Jeremy K. and Reisig, Dominic D. and Smith, Ronald H. and Jacobson, Alana L. and Reay-Jones, Francis P. F. and Paula-Moraes, Silvana and et al.}, year={2022}, month={Jan}, pages={88} } @article{goethe_dorman_wang_kennedy_huseth_2022, title={Spatial and temporal patterns of Frankliniella fusca (Thysanoptera: Thripidae) in wheat agroecosystems}, volume={146}, ISSN={0931-2048 1439-0418}, url={http://dx.doi.org/10.1111/jen.12979}, DOI={10.1111/jen.12979}, abstractNote={AbstractFrankliniella fusca Hinds (Thysanoptera: Thripidae) is an economically important pest of many cultivated crops including cotton, tomatoes, peppers and tobacco. Previous research has focused on the importance of non‐crop weeds for F. fusca populations when estimating crop infestation risk in the spring. Although weeds play an integral role in population development, early‐season cultivated hosts (e.g. wheat and sage) may also contribute and augment overall populations. Few studies have examined the role of early‐season crops as a source habitat for sensitive host crops later in the season. The goal of this study was to investigate the abiotic conditions and landscape components that are associated with F. fusca populations in winter wheat (Triticum aestivum L.). Exploring these relationships will provide insight into early‐season drivers of F. fusca. To do this, we conducted a 2 year study documenting F. fusca populations during an 8 weeks period each spring. We sampled immature thrips abundance on wheat heads while concurrently monitoring adult dispersal from the field using yellow sticky cards. Across both years, we found that immature thrips sampled during the milk and dough development stages best‐predicted adult dispersal 2 weeks later. Cumulative precipitation and the number of precipitation events beginning in the autumn of the prior year were the most important abiotic predictors of F. fusca abundance. At the landscape scale, adult F. fusca density was negatively related to the area of row crop agriculture, grasslands and amount of landscape fragmentation. Results of our study provide a basis to assess larval thrips and forecast dispersal of this pest from wheat using a head sampling method. At a landscape scale, we show that specific combinations of abiotic and landscape variables influence population abundance of F. fusca in North Carolina row crop agroecosystems.}, number={5}, journal={Journal of Applied Entomology}, publisher={Wiley}, author={Goethe, James and Dorman, Seth and Wang, Hehe and Kennedy, George and Huseth, Anders}, year={2022}, month={Feb}, pages={570–578} } @article{krob_stewart_brown_kerns_graham_perkins_huseth_kennedy_reisig_taylor_et al._2022, title={Standardized Field Trials in Cotton and Bioassays to Evaluate Resistance of Tobacco Thrips (Thysanoptera: Thripidae) to Insecticides in the Southern United States}, volume={115}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/toac136}, DOI={10.1093/jee/toac136}, abstractNote={AbstractFoliar-applied insecticide treatments may be necessary to manage thrips in cotton (Gossypium hirsutum L.) under severe infestations or when at-planting insecticide seed treatments do not provide satisfactory protection. The most common foliar-applied insecticide is acephate. Field observations in Tennessee suggest that the performance of acephate has declined. Thus, the first objective was to perform leaf-dip bioassays to assess if tobacco thrips, Frankliniella fusca (Hinds) (Thysanoptera: Thripidae), in cotton production regions have evolved resistance to foliar-applied insecticides. A second objective was to assess the performance of commonly applied foliar insecticides for managing thrips in standardized field trials in Arkansas, Tennessee, Mississippi, and Texas. For both objectives, several insecticides were evaluated including acephate, dicrotophos, dimethoate, lambda-cyhalothrin, imidacloprid, and spinetoram. Field trials and bioassays were completed from 2018 to 2021. Dose-response bioassays with acephate were performed on tobacco thrips field populations and a susceptible laboratory population. Bioassay results suggest that tobacco thrips have developed resistance to acephate and other organophosphate insecticides; however, this resistance seems to be most severe in Arkansas, Tennessee, and the Delta region of Mississippi. Resistance to other classes of insecticides were perhaps even more evident in these bioassays. The performance of these insecticides in field trials was variable, with tobacco thrips only showing consistent signs of resistance to lambda-cyhalothrin. However, it is evident that many populations of tobacco thrips are resistant to multiple classes of insecticides. Further research is needed to determine heritability and resistance mechanism(s).}, number={5}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Krob, Jessica L and Stewart, Scott D and Brown, Sebe A and Kerns, Dawson and Graham, Scott H and Perkins, Clay and Huseth, Anders S and Kennedy, George G and Reisig, Dominic D and Taylor, Sally V and et al.}, editor={Guedes, Raul NarcisoEditor}, year={2022}, month={Sep}, pages={1693–1702} } @article{ogburn_ohmen_huseth_reisig_kennedy_walgenbach_2022, title={Temperature-driven differences in phenology and habitat suitability for brown marmorated stink bug, Halyomorpha halys, in two ecoregions of North Carolina}, volume={96}, ISSN={1612-4758 1612-4766}, url={http://dx.doi.org/10.1007/s10340-022-01497-1}, DOI={10.1007/s10340-022-01497-1}, number={1}, journal={Journal of Pest Science}, publisher={Springer Science and Business Media LLC}, author={Ogburn, Emily C. and Ohmen, Thomas M. and Huseth, Anders S. and Reisig, Dominic D. and Kennedy, George G. and Walgenbach, James F.}, year={2022}, month={Apr}, pages={373–387} } @article{dorman_kudenov_lytle_griffith_huseth_2021, title={Computer vision for detecting field‐evolved lepidopteran resistance to Bt maize}, volume={77}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.6566}, DOI={10.1002/ps.6566}, abstractNote={AbstractBACKGROUNDResistance evolution of lepidopteran pests to Bacillus thuringiensis (Bt) toxins produced in maize and cotton is a significant issue worldwide. Effective toxin stewardship requires reliable detection of field‐evolved resistance to enable the implementation of mitigation strategies. Currently, visual estimates of maize injury are used to document changing susceptibility. In this study, we evaluated an existing maize injury monitoring protocol used to estimate Bt resistance levels in Helicoverpa zea (Lepidoptera: Noctuidae).RESULTSWe detected high interobserver variability across multiple injury metrics, suggesting that the precision and accuracy of maize injury detection could be improved. To do this, we developed a computer vision‐based algorithm to measure H. zea injury. Algorithm estimates were more accurate and precise than a sample of human observers. Moreover, observer estimates tended to overpredict H. zea injury, which may increase the false‐positive rate, leading to prophylactic insecticide application and unnecessary regulatory action.CONCLUSIONSAutomated detection and tracking of lepidopteran resistance evolution to Bt toxins are critical for genetically engineered crop stewardship to prevent the use of additional insecticides to combat resistant pests. Advantages of this computerized screening are: (i) standardized Bt injury metrics in space and time, (ii) preservation of digital data for cross‐referencing when thresholds are reached, and (iii) the ability to increase sample sizes significantly. This technological solution represents a significant step toward improving confidence in resistance monitoring efforts among researchers, regulators and the agricultural biotechnology industry.}, number={11}, journal={Pest Management Science}, publisher={Wiley}, author={Dorman, Seth J and Kudenov, Michael W and Lytle, Amanda J and Griffith, Emily H and Huseth, Anders S}, year={2021}, month={Aug}, pages={5236–5245} } @article{huseth_koch_reisig_davis_paula-moraes_hodgson_2021, title={Current Distribution and Population Persistence of Five Lepidopteran Pests in US Soybean}, volume={12}, ISSN={["2155-7470"]}, url={https://doi.org/10.1093/jipm/pmab004}, DOI={10.1093/jipm/pmab004}, abstractNote={AbstractThe distribution of lepidopteran pests in soybean (Glycine max (L.) Merr.) is a current knowledge gap limiting accurate prioritization of Integrated Pest Management (IPM) research. Regional characterizations of lepidopteran distribution in soybean are now more than 25 yr old. The goal of this study was to generate a contemporary assessment of the distribution and population persistence of lepidopteran soybean pests. To understand which species are currently infesting soybean and their persistence, we conducted a survey of soybean entomologists with responsibility for approximately 33.6 million hectares of production in 31 U.S. states. Soybean entomologists were asked questions about presence of lepidopteran pests and their persistence in their state. We focused this survey on five lepidopteran pests: corn earworm (Helicoverpa zea Boddie) (Lepidoptera: Noctuidae), green cloverworm (Hypena scabra Fabricius) (Lepidoptera: Erebidae), painted lady (Vanessa cardui L.) (Lepidoptera: Nymphalidae), soybean looper (Chrysodeixis includens Walker) (Lepidoptera: Noctuidae), and velvetbean caterpillar (Anticarsia gemmatalis Hübner) (Lepidoptera: Erebidae). Soybean entomologists also provided insight into regionally relevant or sporadic lepidopteran soybean pests. Participants were also questioned about common scouting practices in each state. Results of this survey highlight dissimilar geographic distribution and relative persistence of lepidopteran pests in soybean. Clear differences in occurrence and abundance among species provide important contemporary distributions and persistence estimates. Assessments of scouting practices demonstrate a need to improve IPM adoption in some states. Results of this study and its complementary pest profile (concurrently published in JIPM) provide a contemporary foundation for studies of lepidopteran soybean pests.}, number={1}, journal={JOURNAL OF INTEGRATED PEST MANAGEMENT}, publisher={Oxford University Press (OUP)}, author={Huseth, Anders S. and Koch, Robert L. and Reisig, Dominic and Davis, Jeffrey A. and Paula-Moraes, Silvana V and Hodgson, Erin W.}, editor={Adamczyk, JohnEditor}, year={2021}, month={Mar} } @article{arends_reisig_gundry_huseth_reay-jones_greene_kennedy_2021, title={Effectiveness of the natural resistance management refuge for Bt-cotton is dominated by local abundance of soybean and maize}, volume={11}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/s41598-021-97123-8}, DOI={10.1038/s41598-021-97123-8}, abstractNote={AbstractGenetically engineered crops expressing Bacillus thuringiensis (Bt) Cry toxins have transformed insect management in maize and cotton, reducing insecticide use and associated off-target effects. To mitigate the risk that pests evolve resistance to Bt crops, the US Environmental Protection Agency requires resistance management measures. The approved resistance management plan for Bt maize in cotton production regions requires a structured refuge of non-Bt maize equal to 20% of the maize planted; that for Bt cotton relies on the presence of an unstructured natural refuge comprising both non-Bt crop and non-crop hosts. We examined how abundance of Bt crops (cotton and maize) and an important non-Bt crop (soybean) component of the natural refuge affect resistance to Bt Cry1Ac toxin in local populations of Helicoverpa zea, an important lepidopteran pest impacted by Bt cotton and maize. We show refuge effectiveness is responsive to local abundances of maize and cotton and non-Bt soybean, and maize, in its role as a source of H. zea infesting cotton and non-Bt hosts, influences refuge effectiveness. These findings have important implications for commercial and regulatory decisions regarding deployment of Bt toxins targeting H. zea in maize, cotton, and other crops and for assumptions regarding efficacy of natural refuges.}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Arends, Benjamin and Reisig, Dominic D. and Gundry, Shawnee and Huseth, Anders S. and Reay-Jones, Francis P. F. and Greene, Jeremy K. and Kennedy, George G.}, year={2021}, month={Sep} } @article{pellegrino_dorman_williams_millar_huseth_2021, title={Evaluation of 13-Tetradecenyl Acetate Pheromone for Melanotus communis (Coleoptera: Elateridae) Detection in North Carolina Row Crop Agroecosystems}, volume={50}, ISSN={0046-225X 1938-2936}, url={http://dx.doi.org/10.1093/ee/nvab075}, DOI={10.1093/ee/nvab075}, abstractNote={Abstract Melanotus communis Gyllenhal (Coleoptera: Elateridae) larvae are a common soil-dwelling pest of many crops, including sweet potato, grains, and tobacco. Although many studies have focused on the larval stage of this pest, the seasonal activity and ecology of the adults (click beetles) are not well understood. The overarching goal of this study was to relate M. communis adult activity to host crops in the North Carolina row-crop agroecosystem. To do this, we conducted a two-year study documenting male M. communis activity, using a recently identified sex attractant pheromone, 13-tetradecenyl acetate. This project was divided into two parts: 1) a pheromone assessment study testing the efficacy and specificity of 13-tetradecenyl acetate, and two analogs, 13-tetradecenyl butyrate and 13-tetradecenyl hexanoate, and 2) a landscape survey using traps baited with 13-tetradecenyl acetate. Results of the efficacy study showed that 13-tetradecenyl acetate was the most effective M. communis lure when compared to non-baited control traps or traps baited with the two homologs. The landscape study documented a strong association between M. communis catch and the adjacent crop type. We found that adult M. communis abundance was greatest near corn, followed by sweet potato, and then cotton. Analysis of activity over time found that the peak activity occurred during July. Overall, this project demonstrates the usefulness of pheromone-baited traps in providing new information about M. communis activity.}, number={5}, journal={Environmental Entomology}, publisher={Oxford University Press (OUP)}, author={Pellegrino, Alyssa M and Dorman, Seth J and Williams, Livy, III and Millar, Jocelyn G and Huseth, Anders S}, editor={Stelinski, LukaszEditor}, year={2021}, month={Aug}, pages={1248–1254} } @article{huseth_lytle_dorman_2021, title={Evaluation of Insecticide Tank Mixes for Control of the Wireworm Complex in Sweet Potato, 2020}, volume={46}, url={https://doi.org/10.1093/amt/tsab060}, DOI={10.1093/amt/tsab060}, abstractNote={The goal of this study was to evaluate combinations of soil-applied insecticides against wireworm (Coleoptera: Elateridae) that damage sweet The specific objective was to document damage differences among different pre-plant insecticides paired with bifenthrin as a tank mix. To control for within-season click beetle infestations, all plots received the same post direct application of bifenthrin at vining. We also tested a foliar application of an insecticide for mid-season systemic control. We evaluated the probability of wireworm root damage and damage severity among insecticide treatments. This experiment was performed at two locations. The first trial was conducted at the North Carolina Department of Agriculture and Consumer Services Lower Coastal Plain Research Farm near Hugo, NC (35.3784}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Huseth, Anders S and Lytle, Amanda J and Dorman, Seth J}, editor={Abney, MarkEditor}, year={2021}, month={Jan} } @article{lytle_huseth_2021, title={Impact of foliar insecticide sprays on Melanaphis sacchari (Hemiptera: Aphididae) and natural enemy populations in grain sorghum}, volume={149}, ISSN={0261-2194}, url={http://dx.doi.org/10.1016/j.cropro.2021.105764}, DOI={10.1016/j.cropro.2021.105764}, abstractNote={The sugarcane aphid, Melanaphis sacchari is an important pest of grain sorghum (Sorghum bicolor) in the United States. Current M. sacchari management programs aim to control M. sacchari with insecticides while minimizing impacts on natural enemies that contribute to biological control of aphid populations. As a result, balancing both insecticide efficacy on the target pest and preservation of biological control agents remains an important step toward sustainable management of M. sacchari in grain sorghum. To document tradeoffs between M. sacchari control and non-target impacts, we evaluated three common aphicides (afidopyropen, flupyradifurone, and sulfoxaflor) for M. sacchari control and natural enemy safety. Treatments were paired with surfactants when recommended. Insect abundance was measured before and after foliar insecticide application using randomized complete clock design small plot studies during the 2019 and 2020 field seasons. All plots were harvested at maturity to document the relationship between in-season aphid abundance and grain yield. In this two year study, the average aphid abundance three days after insecticide application was lower in some but not all insecticidal treatments when compared to the untreated control, suggesting some insecticides had limited aphid suppression capabilities. Mean cumulative aphid days were lower in all treated plots compared to the untreated control with the exception of Sefina (afidopyropen). Twenty-eight days after foliar insecticide application, there were no differences in total natural enemy abundance in any of the treatments including the untreated control, suggesting that while M. sacchari populations were reduced by foliar insecticide treatments, the insecticides did not have clear adverse effects to natural enemy populations.}, journal={Crop Protection}, publisher={Elsevier BV}, author={Lytle, Amanda J. and Huseth, Anders S.}, year={2021}, month={Nov}, pages={105764} } @article{dorman_hopperstad_reich_majumder_kennedy_reisig_greene_reay‐jones_collins_bacheler_et al._2021, title={Landscape‐level variation in Bt crops predict Helicoverpa ze a ( Lepidoptera: Noctuidae ) resistance in cotton agroecosystems}, volume={77}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.6585}, DOI={10.1002/ps.6585}, abstractNote={AbstractBACKGROUNDHelicoverpa zea (Boddie) damage to Bt cotton and maize has increased as a result of widespread Bt resistance across the USA Cotton Belt. Our objective was to link Bt crop production patterns to cotton damage through a series of spatial and temporal surveys of commercial fields to understand how Bt crop production relates to greater than expected H. zea damage to Bt cotton. To do this, we assembled longitudinal cotton damage data that spanned the Bt adoption period, collected cotton damage data since Bt resistance has been detected, and estimated local population susceptibility using replicated on‐farm studies that included all Bt pyramids marketed in cotton.RESULTSSignificant year effects of H. zea damage frequency in commercial cotton were observed throughout the Bt adoption period, with a recent damage increase after 2012. Landscape‐level Bt crop production intensity over time was positively associated with the risk of H. zea damage in two‐ and three‐toxin pyramided Bt cotton. Helicoverpa zea damage also varied across Bt toxin types in spatially replicated on‐farm studies.CONCLUSIONSLandscape‐level predictors of H. zea damage in Bt cotton can be used to identify heightened Bt resistance risk areas and serves as a model to understand factors that drive pest resistance evolution to Bt toxins in the southeastern United States. These results provide a framework for more effective insect resistance management strategies to be used in combination with conventional pest management practices that improve Bt trait durability while minimizing the environmental footprint of row crop agriculture. © 2021 Society of Chemical Industry. This article has been contributed to by US Government employees and their work is in the public domain in the USA.}, number={12}, journal={Pest Management Science}, publisher={Wiley}, author={Dorman, Seth J and Hopperstad, Kristen A and Reich, Brian J and Majumder, Suman and Kennedy, George and Reisig, Dominic D and Greene, Jeremy K and Reay‐Jones, Francis PF and Collins, Guy and Bacheler, Jack S and et al.}, year={2021}, month={Aug}, pages={5454–5462} } @article{goethe_dorman_huseth_2021, title={Local and landscape scale drivers of Euschistus servus and Lygus lineolaris in North Carolina small grain agroecosystems}, volume={23}, ISSN={1461-9555 1461-9563}, url={http://dx.doi.org/10.1111/afe.12445}, DOI={10.1111/afe.12445}, abstractNote={ Crop production sequences influence arthropod populations in temporally unstable row crop systems. Winter wheat (Triticum aestivum L.) represents one of the earliest abundant crops in south‐eastern United States. This study aims to understand primary source habitats driving brown stink bug, Euschistus servus (Say), and tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), population abundance in wheat. To better understand these relationships, adult and nymphal densities were in wheat fields weekly from flowering through harvest in 2019 and 2020. Geospatial data were used to measure landscape composition surrounding sampled fields. We investigated the influence of landscape predictors on E. servus and L. lineolaris abundance using generalized linear mixed modelling. Field size, proportion of agriculture, proportion of wheat area, and proportion of soybean Glycine max L.) area from the previous year in the surrounding landscape were associated with E. servus abundance in wheat. Similarly, L. lineolaris abundance was associated with proportion of wheat area and soybean area from the previous year. These results reveal the influence of soybean area planted the previous year on insect pest densities the following spring in wheat. Further, results suggest agricultural landscapes dominated by wheat are associated with decreased pest abundance across the sampled region. }, number={4}, journal={Agricultural and Forest Entomology}, publisher={Wiley}, author={Goethe, James K. and Dorman, Seth J. and Huseth, Anders S.}, year={2021}, month={Apr}, pages={441–451} } @misc{vann_everman_holshouser_huseth_reisig_thiessen_2021, title={Soybean producers guide}, url={http://dx.doi.org/10.2737/srs-gtr-260q}, DOI={10.2737/srs-gtr-260q}, abstractNote={This is 1 of 23 guides to help Southeastern U.S. producers of economically important agricultural commodities build resilience to, prepare for, and recover from hurricane impacts}, journal={Hurricane preparation and recovery in the Southeastern United States}, publisher={U.S. Department of Agriculture, Forest Service, Southern Research Station}, author={Vann, Rachel and Everman, Wesley and Holshouser, David and Huseth, Anders and Reisig, Dominic and Thiessen, Lindsey}, year={2021}, month={Aug}, pages={1–50} } @article{dorman_hopperstad_reich_kennedy_huseth_2021, title={Soybeans as a non-Bt refuge for Helicoverpa zea in maize-cotton agroecosystems}, volume={322}, ISSN={0167-8809}, url={http://dx.doi.org/10.1016/j.agee.2021.107642}, DOI={10.1016/j.agee.2021.107642}, abstractNote={Geospatial models are crucial for identifying likely ‘hot-spots’ of Bt resistance evolution in Helicoverpa zea (Lepidoptera: Noctuidae), thereby improving regional insecticide resistance management (IRM) strategies and planted refuge compliance. To characterize H. zea distributions in relation to land use , we used historical trapping data collected from 2008 to 2019 in North Carolina to model the spatial and temporal abundance of H. zea populations across Bt -dominated landscapes. Helicoverpa zea abundance was standardized across site-year observations, and candidate landscape composition and configuration predictors of H. zea abundance were obtained. Spatiotemporal Bayesian hierarchical models were developed to make posterior predictions of H. zea abundance from environmental covariates, and results were used to generate interpolation prediction maps to visualize H. zea abundance across the sampled region. Our results suggest inverse distance weighted (IDW) soybeans is the most important predictor of H. zea abundance through time in row crop agroecosystems in North Carolina. Soybeans in North Carolina and southeastern U.S. likely serves as a critical non- Bt refuge for delaying H. zea resistance to Bt toxins in landscapes dominated by Bt maize and cotton. Moreover, soybean abundance can be used to predict the spatial abundance of H. zea in this region. Results can be applied to understand population dynamics of H. zea in landscapes dominated by genetically engineered (GE) crops expressing Bt toxins and will enable the development of sound insect resistance management strategies of H. zea populations to GE toxins targeting noctuid pests of maize and cotton. This work will also drive future geospatial studies investigating environmental predictors of resistance evolution in arthropod pests to GE technologies in crop production systems. Landscape-level variation in soybeans predicts spatial and temporal Helicoverpa zea abundance and likely serves as important non- Bt refugia in maize and cotton agroecosystems. • Helicoverpa zea population dynamics in row crops relate to landscape drivers • Landscape-level soybean and cotton variation in the southeastern U.S. associate with increased H. zea abundance through time • Soybeans likely serve as critical non- Bt refugia for delaying H. zea resistance in maize and cotton agroecosystems}, journal={Agriculture, Ecosystems & Environment}, publisher={Elsevier BV}, author={Dorman, Seth J. and Hopperstad, Kristen A. and Reich, Brian J. and Kennedy, George and Huseth, Anders S.}, year={2021}, month={Dec}, pages={107642} } @article{clements_lamour_frost_dwyer_huseth_groves_2021, title={Targeted RNA sequencing reveals differential patterns of transcript expression in geographically discrete, insecticide resistant populations of Leptinotarsa decemlineata}, volume={77}, ISSN={["1526-4998"]}, url={https://doi.org/10.1002/ps.6393}, DOI={10.1002/ps.6393}, abstractNote={AbstractBACKGROUNDThe Colorado potato beetle (Leptinotarsa decemlineata Say) is a major agricultural pest of commercial potatoes, partially due to its ability to rapidly develop resistance to multiple insecticide modes of action. Patterns of L. decemlineata insecticide resistance in the contiguous United States have been linked to geographic location and regional management practices. Several previous studies have classified enzymes that are overexpressed following L. decemlineata exposure to commercial pesticides, many of which have been linked to xenobiotic metabolism. Studies have further associated geographic disparities in resistance patterns to cross‐resistance driven by fungicide exposure in the East Coast and Midwest.RESULTSIn this study, our objective was to investigate transcript expression of 38 previously classified detoxification enzymes induced by imidacloprid (an insecticide) and chlorothalonil (a fungicide) within five discrete populations of L. decemlineata obtained from areas in the USA representing eastern, midwestern and western production regions. We found unique patterns of transcript expression in different geographic locations, including overexpression of transcripts related to insecticide metabolism within insecticide‐resistant populations.CONCLUSIONThe results suggest the genetic response of these populations may be partially linked to geographic location and corresponding management practices. © 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.}, number={7}, journal={PEST MANAGEMENT SCIENCE}, publisher={Wiley}, author={Clements, Justin and Lamour, Kurt and Frost, Kenneth and Dwyer, James and Huseth, Anders and Groves, Russell L.}, year={2021}, month={Jul}, pages={3436–3444} } @article{pellegrino_woodley_huseth_2021, title={Understanding the Relationship Between Wireworm (Coleoptera: Elateridae) Damage, Varietal Resistance, and Cover Crop Use in Organic Sweetpotato}, volume={114}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/toab118}, DOI={10.1093/jee/toab118}, abstractNote={Abstract North Carolina is the largest producer of sweetpotato (Ipomoea batatus L.) in the United States but only a small percentage of total production is organic. Transition to organic sweetpotato production has been limited, in part due to a lack of effective non-chemical strategies to control wireworms (Coleoptera: Elateridae). To help bridge this knowledge gap, this study focused on documenting the relationship between wireworm damage to sweetpotato roots and the use of cover crops, a common way to maintain soil health in organic production. This study also tested a wireworm-resistant variety (Monaco) against the widely cultivated susceptible variety (Covington). Two different field studies were used to test the interaction between cover crops and insect-resistant sweetpotato varieties. We first examined a reduced-till cover crop system where cover crop residue remained on the soil surface when transplanting sweetpotato. The following year, we tested a fully incorporated cover crop system with spring termination and intensive tillage before sweetpotato transplanting. To complement these field studies, a greenhouse experiment was conducted to compare the efficacy of the wireworm-resistant variety with two susceptible sweetpotato varieties. Results show that varietal resistance had a strong effect on the amount of wireworm damage observed, with susceptible sweetpotato having more direct wireworm damage than the resistant variety. The effect of the cover crop was not found to be significant in any trial. This study provides important context about the role of varietal resistance in organic production and relatively low risk of cover crop use.}, number={5}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Pellegrino, Alyssa M and Woodley, Alex L and Huseth, Anders S}, editor={Munyaneza, JosephEditor}, year={2021}, month={Sep}, pages={2127–2134} } @inproceedings{roberts_toews_taylor_reisig_huseth_reay-jones_greene_paula-moraes_jacobson_graham_et al._2020, title={Cotton aphid insecticide efficacy in the southeast: a two year summary}, booktitle={Proceedings of the Cotton Beltwide Meeting}, author={Roberts, P. and Toews, M. and Taylor, S. and Reisig, D. and Huseth, A. and Reay-Jones, F. and Greene, J.K. and Paula-Moraes, S. and Jacobson, A. and Graham, S. and et al.}, year={2020} } @article{d’ambrosio_pellegrino_perez_goethe,_huseth_2020, title={Evaluation of Soil-Applied Insecticides for Control of the Wireworm Complex in Sweet Potato, 2019}, volume={45}, ISSN={2155-9856}, url={http://dx.doi.org/10.1093/amt/tsaa038}, DOI={10.1093/amt/tsaa038}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={D’Ambrosio, Damon A and Pellegrino, Alyssa M and Perez, Sawyer B and Goethe,, James K and Huseth, Anders S}, editor={Abney, MarkEditor}, year={2020}, month={Jan} } @article{d'ambrosio_kennedy_huseth_2020, title={Feeding behavior of Frankliniella fusca on seedling cotton expressing Cry51Aa2 .834_16 Bt toxin}, volume={76}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.5825}, DOI={10.1002/ps.5825}, abstractNote={AbstractBACKGROUNDTobacco thrips, Frankliniella fusca (Hinds), is a pest of cotton. Currently, growers rely on neonicotinoid seed treatments to control F. fusca. However, the occurrence of neonicotinoid‐resistant F. fusca populations has created new challenges for their management. Development of thrips‐active Cry51Aa2.834_16 Bacillus thuringiensis (Bt) toxin expressed in MON 88702 cotton will be an important new tactic for thrips management. Previous studies have shown that MON 88702 causes limited mortality of F. fusca adults and larvae but reduces infestations on seedling cotton by suppressing oviposition from colonizing adults. This suggests that the toxin affects host preference of adult F. fusca. Knowledge of the effect of this trait on F. fusca feeding behavior provides a more complete understanding of MON 88702 activity. Using electropenetrography, we compared the feeding behaviors of adult F. fusca females on MON 88702 cotton and a non‐Bt isoline cotton over 2 h. The number of probes, proportion of probes resulting in ingestion, total duration of ingestion, and duration of ingestion per event were measured.RESULTSOn MON 88702 seedlings, F. fusca probed and ingested fewer times than those on non‐Bt cotton. Probes on MON 88702 were less likely to lead to ingestion than on non‐Bt cotton. The total duration of ingestion and duration of ingestion per event did not differ between treatments.CONCLUSIONThe results show that MON 88702 has an antifeedant effect on F. fusca, which provides insight into behavioral responses driving MON 88702 aversion and anti‐oviposition documented in previous studies. © 2020 Society of Chemical Industry}, number={8}, journal={Pest Management Science}, publisher={Wiley}, author={D'Ambrosio, Damon A and Kennedy, George G and Huseth, Anders S}, year={2020}, month={Apr}, pages={2781–2786} } @article{thiessen_schappe_zaccaron_conner_koebernick_jacobson_huseth_2020, title={First Report of Cotton Leafroll Dwarf Virus in Cotton Plants Affected by Cotton Leafroll Dwarf Disease in North Carolina}, volume={104}, ISSN={0191-2917 1943-7692}, url={http://dx.doi.org/10.1094/PDIS-02-20-0335-PDN}, DOI={10.1094/PDIS-02-20-0335-PDN}, abstractNote={HomePlant DiseaseVol. 104, No. 12First Report of Cotton Leafroll Dwarf Virus in Cotton Plants Affected by Cotton Leafroll Dwarf Disease in North Carolina PreviousNext DISEASE NOTES OPENOpen Access licenseFirst Report of Cotton Leafroll Dwarf Virus in Cotton Plants Affected by Cotton Leafroll Dwarf Disease in North CarolinaLindsey D. Thiessen, Tyler Schappe, Marcio Zaccaron, Kassie Conner, Jenny Koebernick, Alana Jacobson, and Anders HusethLindsey D. Thiessen†Corresponding author: L. D Thiessen; E-mail Address: ldthiess@ncsu.eduhttp://orcid.org/0000-0001-5029-0139North Carolina State University, Raleigh, NC 27695Search for more papers by this author, Tyler SchappeNorth Carolina State University, Raleigh, NC 27695Search for more papers by this author, Marcio ZaccaronAuburn University, Auburn, AL 36849Search for more papers by this author, Kassie ConnerAlabama Cooperative Extension System, Auburn University, Auburn, AL 36849Search for more papers by this author, Jenny KoebernickAuburn University, Auburn, AL 36849Search for more papers by this author, Alana JacobsonAuburn University, Auburn, AL 36849Search for more papers by this author, and Anders HusethNorth Carolina State University, Raleigh, NC 27695Search for more papers by this author AffiliationsAuthors and Affiliations Lindsey D. Thiessen1 † Tyler Schappe1 Marcio Zaccaron2 Kassie Conner3 Jenny Koebernick2 Alana Jacobson2 Anders Huseth1 1North Carolina State University, Raleigh, NC 27695 2Auburn University, Auburn, AL 36849 3Alabama Cooperative Extension System, Auburn University, Auburn, AL 36849 Published Online:8 Oct 2020https://doi.org/10.1094/PDIS-02-20-0335-PDNAboutSectionsView articlePDFSupplemental ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat View articleDuring the 2019 growing season, cotton (Gossypium hirsutum L.) plants in North Carolina were observed to have virus-like symptoms including leaf rugosity, leaf curling, and shortened upper internodes, consistent with cotton leafroll dwarf disease (CLRDD) associated with cotton leafroll dwarf virus (CLRDV, family Luteoviridae, genus Polerovirus) (Avelar et al. 2020). Sentinel plots planted on June 17, 2019, at the Sandhills Research Station in Moore County, NC, exhibited CLRDD symptoms, and disease incidence was estimated at 75% on a 0.1-ha field. Cotton aphids (Aphis gossypii Glover), the reported vector of CLRDV (Heilsnis et al. 2020; McLaughlin et al. 2020; Michelotto and Busoli 2007), were detected on plants throughout the growing season. Samples (n = 24) were collected from sentinel plots on September 20, 2019, to test for CLRDV through reverse transcription PCR. Each sample represented five symptomatic plants collected from a single plot. Total RNA was extracted from the petiole tissue of each sample using a Qiagen RNeasy Plant Mini kit (Qiagen, Germantown, MD), following the manufacturer’s recommendations. The cDNA was synthesized using a SuperScript IV first-strand synthesis system (ThermoFisher Scientific, Waltham, MA) and amplified with CLRDV-specific PCR primers CLRDV3675F/Pol3982R (Sharman et al. 2015) targeting a 310-bp genome segment of ORF3-5. Seven CLRDV-positive samples were further amplified with two additional primer sets specifically designed to detect CLRDV: AL674F/AL1407R (Avelar et al. 2019), targeting a 733-bp portion of the ORF0-ORF1, and CLPOF/CLPOR (Cascardo et al. 2015), amplifying an 880-bp fragment spanning the ORF0. Nucleotide BLAST searches showed that the best matches for all sequences in this study were derived from CLRDV with a range of pairwise identity of 99.2 to 100% for all genome segments. From symptomatic samples (n = 14), the isolated virus was confirmed as CLRDV in several cotton varieties, including Deltapine 1646 B2XF (GenBank accessions MN958131 [ORF3-5], MN958147 [ORF0-ORF1], MN958138 [ORF0], MN958133 [ORF3-5], MN958145 [ORF0-ORF1], and MN958140 [ORF0]), Phytogen 480 W3FE (MN958134 [ORF3-5], MN958144 [ORF0-ORF1], and MN958141 [ORF0]), Stoneville 5471 GLTP (MN958135 [ORF3-5], MN958143 [ORF0-ORF1], and MN958142 [ORF0]), and Nextgen 5711 B3XF (MN958130 [ORF3-5], MN958148 [ORF0-ORF1], MN958137 [ORF0], MN958132 [ORF3-5], MN958146 [ORF0-ORF1], MN958139 [ORF0], and MN958136 [ORF3-5]). CLRDD is a newly named disease of cotton in the United States that was first reported in Alabama (Avelar et al. 2019), Georgia (Tabassum et. al. 2019), Mississippi (Aboughanem-Sabanadzovic et. al. 2019), and Texas (Alabi et al. 2020). Although the virus has been reported with variable impacts, losses can be extensive in some fields that are affected (Avelar et al. 2019). North Carolina produced over one million bales of cotton in 2019, and given reported losses among fields with high disease incidence, CLRDV has the potential to significantly reduce cotton yield and quality for the state if it becomes widespread.The author(s) declare no conflict of interest.References:Aboughanem-Sabanadzovic, N., et al. 2019. Plant Dis. 103:1798. https://doi.org/10.1094/PDIS-01-19-0017-PDN Link, ISI, Google ScholarAlabi, O. J., et al. 2020. Plant Dis. 104:998. https://doi.org/10.1094/PDIS-09-19-2008-PDN Link, ISI, Google ScholarAvelar, S., et al. 2019. Plant Dis. 103:592. https://doi.org/10.1094/PDIS-09-18-1550-PDN Link, ISI, Google ScholarAvelar, S., et al. 2020. Plant Dis. 104:780. https://doi.org/10.1094/PDIS-06-19-1316-RE Link, ISI, Google ScholarCascardo, R. S., et al. 2015. Virol. J. 12:123. https://doi.org/10.1186/s12985-015-0356-7 Crossref, ISI, Google ScholarHeilsnis, B., et al. 2020. Proc. Beltwide Cotton Conf., Austin, TX. Google ScholarMcLaughlin, A. K., et al. 2020. Proc. Beltwide Cotton Conf., Austin, TX. Google ScholarMichelotto, M. D., and Busoli, A. C. 2007. Campinas 66:441. Google ScholarSharman, M., et al. 2015. Australas. Plant Dis. Notes 10:24. https://doi.org/10.1007/s13314-015-0174-1 Crossref, ISI, Google ScholarTabassum, A., et al. 2019. Plant Dis. 103:1803. https://doi.org/10.1094/PDIS-12-18-2197-PDN Link, ISI, Google ScholarThe author(s) declare no conflict of interest.DetailsFiguresLiterature CitedRelated Vol. 104, No. 12 December 2020SubscribeISSN:0191-2917e-ISSN:1943-7692 DownloadCaptionUredinia of Phragmidium violaceum on European blackberry (K. J. Evans et al.). Photo credit: L. Morin. Strawberry fruit rot caused by Sclerotinia sclerotiorum (M. V. Marin and N. A. Peres). Photo credit: M. V. Marin. Metrics Downloaded 897 times Article History Issue Date: 1 Dec 2020Published: 8 Oct 2020First Look: 26 Jun 2020Accepted: 23 Jun 2020 Page: 3275 Information© 2020 The American Phytopathological SocietyKeywordscotton leafroll dwarf viruscottonCLRDVviruses and viroidsThe author(s) declare no conflict of interest.PDF downloadCited ByInvestigating the effects of planting date and Aphis gossypii management on reducing the final incidence of cotton leafroll dwarf virusCrop Protection, Vol. 158Complete Genome Sequence of Cotton Leafroll Dwarf Virus Infecting Cotton in Oklahoma, USAMicrobiology Resource Announcements, Vol. 11, No. 7First Report of Cotton Leafroll Dwarf Virus Infecting Hibiscus syriacus in South KoreaDavaajargal Igori, Ah-Young Shin, Se Eun Kim, Suk-Yoon Kwon, and Jae Sun Moon5 February 2022 | Plant Disease, Vol. 0, No. jaCotton Leafroll Dwarf Virus US Genomes Comprise Divergent Subpopulations and Harbor Extensive Variability5 November 2021 | Viruses, Vol. 13, No. 11Effect of Cotton Leafroll Dwarf Virus on Physiological Processes and Yield of Individual Cotton Plants1 October 2021 | Frontiers in Plant Science, Vol. 12Genome analysis of cotton leafroll dwarf virus reveals variability in the silencing suppressor protein, genotypes and genomic recombinants in the USA7 July 2021 | PLOS ONE, Vol. 16, No. 7Natural host range, incidence on overwintering cotton and diversity of cotton leafroll dwarf virus in Georgia USACrop Protection, Vol. 144}, number={12}, journal={Plant Disease}, publisher={Scientific Societies}, author={Thiessen, Lindsey D. and Schappe, Tyler and Zaccaron, Marcio and Conner, Kassie and Koebernick, Jenny and Jacobson, Alana and Huseth, Anders}, year={2020}, month={Dec}, pages={3275} } @inbook{reisig_huseth_2020, place={Raleigh, NC}, title={Insect control}, url={https://content.ces.ncsu.edu/north-carolina-agricultural-chemicals-manual/insect-control}, booktitle={2023 North Carolina Agricultural Chemicals Manual}, publisher={North Carolina State Cooperative Extension}, author={Reisig, Dd and Huseth, As}, year={2020} } @article{dorman_schürch_huseth_taylor_2020, title={Landscape and climatic effects driving spatiotemporal abundance of Lygus lineolaris (Hemiptera: Miridae) in cotton agroecosystems}, volume={295}, ISSN={0167-8809}, url={http://dx.doi.org/10.1016/j.agee.2020.106910}, DOI={10.1016/j.agee.2020.106910}, abstractNote={Lygus lineolaris populations have become increasingly problematic in Virginia cotton since 2013. Although production practices have changed, changes in landscape composition and climatic conditions are also anecdotally associated with increasing populations. To better understand the recent increase in L. lineolaris infestations in Virginia cotton, 56 commercial cotton fields were sampled weekly in 2017 and 2018 for a nine-week period during the growing season. Insect density was measured using sweep net and black drop cloth sampling, targeting adult and nymphal populations, respectively. Geospatial crop production and forest disturbance data were used to measure the composition and management history of landscapes adjacent to sample fields. We also used spatial climate data sets to document the relationship between increasing L. lineolaris and temperature variation. We investigated the significance of landscape composition and climatic effects increasing L. lineolaris infestation intensity using a regression modeling approach. We found the best overall predictor of L. lineolaris abundance was higher annual minimum temperatures. Several crop components in the landscape were significant, specifically corn and double-crop winter wheat and soybeans, but these habitat patches did not explain high levels of variability. Results of this study suggest that increasing minimum temperatures will favor L. lineolaris and may translate into elevated infestation intensity and increasing dependence on insecticide inputs to manage this problematic pest of cotton. Results of this study will be important to describe short- and long-term factors driving L. lineolaris infestation risk in cotton agroecosystems.}, journal={Agriculture, Ecosystems & Environment}, publisher={Elsevier BV}, author={Dorman, Seth J. and Schürch, Roger and Huseth, Anders S. and Taylor, Sally V.}, year={2020}, month={Jun}, pages={106910} } @article{montgomery_henry_vann_whipker_huseth_mitasova_2020, title={Measures of Canopy Structure from Low-Cost UAS for Monitoring Crop Nutrient Status}, volume={4}, ISSN={2504-446X}, url={http://dx.doi.org/10.3390/drones4030036}, DOI={10.3390/drones4030036}, abstractNote={Deriving crop information from remotely sensed data is an important strategy for precision agriculture. Small unmanned aerial systems (UAS) have emerged in recent years as a versatile remote sensing tool that can provide precisely-timed, fine-grained data for informing management responses to intra-field crop variability (e.g., nutrient status and pest damage). UAS sensors with high spectral resolution used to compute informative vegetation indices, however, are practically limited by high cost and data dimensionality. This research extends spectral analysis for remote crop monitoring to investigate the relationship between crop health and 3D canopy structure using low-cost UAS equipped with consumer-grade RGB cameras. We used flue-cured tobacco as a case study due to its known sensitivity to fertility variation and nutrient-specific symptomology. Fertilizer treatments were applied to induce plant health variability in a 0.5 ha field of flue-cured tobacco. Multi-view stereo images from three UAS surveys collected during crop development were processed into orthoimages used to compute a visible band spectral index and photogrammetric point clouds using Structure from Motion (SfM). Plant structural metrics were then computed from detailed high resolution canopy surface models (0.05 m resolution) interpolated from the photogrammetric point clouds. The UAS surveys were complimented by nutrient status measurements obtained from plant tissues. The relationships between foliar nitrogen (N), phosphorus (P), potassium (K), and boron (B) concentrations and the UAS-derived metrics were assessed using multiple linear regression. Symptoms of N and K deficiencies were well captured and differentiated by the structural metrics. The strongest relationship observed was between canopy shape and N foliar concentration (adj. r2 = 0.59, increasing to adj. r2 = 0.81 when combined with the spectral index). B foliar concentration was consistently better predicted by canopy structure with a maximum adj. r2 = 0.41 observed at the latest growth stage surveyed. Overall, combining information about canopy structure and spectral reflectance increased model fit for all measured nutrients compared to spectral alone. These results suggest that an important relationship exists between relative canopy shape and crop health that can be leveraged to improve the usefulness of low cost UAS for precision agriculture.}, number={3}, journal={Drones}, publisher={MDPI AG}, author={Montgomery, Kellyn and Henry, Josh and Vann, Matthew and Whipker, Brian E. and Huseth, Anders and Mitasova, Helena}, year={2020}, month={Jul}, pages={36} } @book{reisig_huseth_2020, place={Raleigh, NC}, title={North Carolina Insect Scouting Guide}, url={https://cotton.ces.ncsu.edu/insect-scouting-guide/}, journal={North Carolina Extension Cotton Portal}, institution={North Carolina State Cooperative Extension}, author={Reisig, D.D. and Huseth, A.S.}, year={2020} } @article{kennedy_huseth_2020, title={Pest pressure relates to similarity of crops and native plants}, volume={117}, ISSN={0027-8424 1091-6490}, url={http://dx.doi.org/10.1073/pnas.2020945117}, DOI={10.1073/pnas.2020945117}, abstractNote={Since the Green Revolution, scientists have documented countless unanticipated consequences of widespread pesticide use in agriculture. These consequences are balanced by the growing necessity to manage agricultural pests. The trade-offs have motivated research to produce inexpensive and accessible food while simultaneously improving the sustainability of agriculture from field to fork. Although decades of research inform our understanding of relationships between pests, crops, and pesticides, the general systemic drivers and patterns of crop-specific pesticide use remain unclear. Understanding fundamental ecological factors that motivate pesticide use on crops is a key knowledge gap that perpetuates this ongoing dependence on pesticides. Pearse and Rosenheim (1) study several general drivers of pest pressure and associated pesticide use in California, one of the most intensive agricultural production regions worldwide. Because of the immense crop diversity and accessible data about the pesticide inputs used on those crops, the authors are able use this complex agricultural system as a test bed to ask whether pest pressure and pesticide use on agricultural crops are related to the evolutionary distance between important crop plants and their native relatives growing in noncrop areas of California (1). This study (1) builds on a growing body of evidence that the phylogenetic structure of plant communities can have predictable impacts on pests and diseases of plants in managed and natural systems (2⇓⇓–5). Pearse and Rosenheim examine economic crop value and evolutionary history to describe the numbers of arthropod pest and crop pathogen species affecting each crop in the study region. To do this, they investigate 93 major annual and perennial Californian crops (>600-ha average area) and link economic crop value, plant community ecology, and phylogenetic relationships to describe … [↵][1]1To whom correspondence may be addressed. Email: gkennedy{at}ncsu.edu. [1]: #xref-corresp-1-1}, number={47}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Kennedy, George G. and Huseth, Anders S.}, year={2020}, month={Nov}, pages={29260–29262} } @book{huseth_2020, place={Raleigh, NC}, title={Strategies for wireworm – evaluating chlorpyrifos alternatives}, url={https://vegetables.ces.ncsu.edu/sweetpotato-fieldday/}, journal={2020 Virtual Sweetpotato Field Day}, institution={North Carolina State Cooperative Extension}, author={Huseth, A.S.}, year={2020}, month={Nov} } @article{saia_nelson_huseth_grieger_reich_2022, title={Transitioning Machine Learning from Theory to Practice in Natural Resources Management}, volume={1}, url={https://doi.org/10.31223/X5D01H}, DOI={10.31223/X5D01H}, abstractNote={Advances in sensing and computation have accelerated at unprecedented rates and scales, in turn creating new opportunities for natural resources managers to improve adaptive and predictive management practices by coupling large environmental datasets with machine learning (ML). Yet, to date, ML models often remain inaccessible to managers working outside of academic research. To identify challenges preventing natural resources managers from putting ML into practice more broadly, we convened a group of 23 stakeholders (i.e., applied researchers and practitioners) who model and analyze data collected from environmental and agricultural systems. Workshop participants shared many barriers regarding their perceptions of, and experiences with, ML modeling. These barriers emphasized three main areas of concern: ML model transparency, availability of educational resources, and the role of process-based understanding in ML model development. Informed by workshop participant input, we offer recommendations on how the ecological modelling community can overcome key barriers preventing ML model use in natural resources management and advance the profession towards data-driven decision-making.}, publisher={California Digital Library (CDL)}, author={Saia, Sheila and Nelson, Natalie and Huseth, Anders and Grieger, Khara and Reich, Brian}, year={2022}, month={Jan} } @article{saia_nelson_huseth_grieger_reich_2020, title={Transitioning Machine Learning from Theory to Practice in Natural Resources Management}, volume={435}, ISSN={0304-3800}, url={http://dx.doi.org/10.1016/j.ecolmodel.2020.109257}, DOI={10.1016/j.ecolmodel.2020.109257}, journal={Ecological Modelling}, publisher={Elsevier BV}, author={Saia, S.M. and Nelson, N. and Huseth, A.S. and Grieger, K and Reich, B.J.}, year={2020}, month={Nov}, pages={109257} } @article{huseth_d’ambrosio_kennedy_2020, title={Understanding the potential impact of continued seed treatment use for resistance management in Cry51Aa2.834_16 Bt cotton against Frankliniella fusca}, volume={15}, ISSN={1932-6203}, url={http://dx.doi.org/10.1371/journal.pone.0239910}, DOI={10.1371/journal.pone.0239910}, abstractNote={Transgenic cotton expressing Cry51Aa2.834_16 Bt toxin (hereafter referred to as MON 88702) has the potential to be an important tool for pest management due to its unique activity against tobacco thrips, Frankliniella fusca. Unlike other Bt toxins targeting lepidopteran cotton pests, MON 88702 does not cause direct mortality but has an antixenotic effect that suppresses F. fusca oviposition. Previous work has shown neonicotinoid seed treated (NST) crops have similar behavioral effects on thrips. This study used non-choice and common garden experiments to examine how the presence of MON 88702 cotton and soybean (another F. fusca host) with and without NSTs might alter F. fusca infestation distributions. In a no-choice environment, significant larval establishment differences were observed, with untreated soybean plants becoming most heavily infested. In choice experiments, plants expressing MON 88702 or were neonicotinoid treated had significantly lower larval establishment. Larval density decreased as dispersal distance increased, suggesting reproductive decisions were negatively related to distance from the release point. Understanding how F. fusca responds to MON 88702 in an environment where adults can choose among multiple host plants will provide valuable context for projections regarding design of MON 88702 resistance refuges. Reduced larval establishment on NST cotton and soybean suggests that area-wide use of NSTs could reduce the number of susceptible F. fusca generated in unstructured crop refuges for MON 88702. These results also suggest that although the presence of NST MON 88702 could suppress reproduction and resistance selection, over time this benefit could erode resulting in increased larval establishment on NST cotton and soybean due to increased frequency of neonicotinoid resistant F. fusca populations.}, number={10}, journal={PLOS ONE}, publisher={Public Library of Science (PLoS)}, author={Huseth, Anders S. and D’Ambrosio, Damon A. and Kennedy, George G.}, editor={Gao, YulinEditor}, year={2020}, month={Oct}, pages={e0239910} } @book{reisig_collins_huseth_2019, place={Raleigh, NC}, title={Choosing an insecticidal seed treatment or in-furrow for thrips in cotton}, url={https://cotton.ces.ncsu.edu/2019/02/choosing-an-insecticidal-seed-treatment-or-in-furrow-for-thrips-in-cotton-reisig-collins-huseth/}, institution={North Carolina Cooperative Extension}, author={Reisig, D.D. and Collins, G. and Huseth, A.S.}, year={2019}, month={Feb} } @inbook{jennings_quesada-ocampo_schultheis_woodley_yencho_pecota_huseth_smith_boyette_2019, title={Crop Production Management - Sweetpotatoes}, url={https://content.ces.ncsu.edu/north-carolina-organic-commodities-production-guide/chapter-8-crop-production-management-sweetpotatoes}, number={AG-660}, booktitle={North Carolina Organic Commodities Production Guide}, author={Jennings, K. and Quesada-Ocampo, L. and Schultheis, J. and Woodley, A. and Yencho, C. and Pecota, K. and Huseth, A. and Smith, S.C. and Boyette, M.}, year={2019} } @book{huseth_thiessen_collins_reisig_2019, place={Raleigh, NC}, title={Detection of Cotton Leafroll Dwarf Virus (CLRDV) in North Carolina}, url={https://cotton.ces.ncsu.edu/2019/12/detection-of-cotton-leafroll-dwarf-virus-clrdv-in-north-carolina/}, institution={North Carolina Cooperative Extension}, author={Huseth, A.S. and Thiessen, L. and Collins, G. and Reisig, D.D.}, year={2019}, month={Dec} } @article{huseth_d’ambrosio_lafferty_2019, title={Evaluation of Soil-Applied Insecticides for Control of the Wireworm Complex in Sweet Potato, 2018}, volume={44}, ISSN={2155-9856}, url={http://dx.doi.org/10.1093/amt/tsz019}, DOI={10.1093/amt/tsz019}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Huseth, Anders S and D’Ambrosio, Damon A and Lafferty, Amanda J}, year={2019}, month={Jan} } @book{reisig_huseth_2019, place={Raleigh, NC}, title={Fall armyworm infestations widespread in southeastern North Carolina}, url={https://soybeans.ces.ncsu.edu/2019/10/fall-armyworm-infestations-widespread-in-southeastern-north-carolina/}, institution={North Carolina Cooperative Extension}, author={Reisig, Dd and Huseth, As}, year={2019}, month={May} } @article{d'ambrosio_kennedy_huseth_2020, title={Frankliniella fusca and Frankliniella occidentalis response to thrips-active Cry51Aa2.834_16 Bt cotton with and without neonicotinoid seed treatment}, volume={129}, ISSN={0261-2194}, url={http://dx.doi.org/10.1016/j.cropro.2019.105042}, DOI={10.1016/j.cropro.2019.105042}, abstractNote={Frankliniella fusca (Hinds) and F. occidentalis (Pergande) are economically important thrips species in cotton production. In the Southeast and Mid-South, F. fusca is an early season seedling pest. In the West, F. occidentalis is a sporadic pest of seedling cotton and a predator of other cotton pests. A novel Bt toxin, Cry51Aa2.834_16 expressed in MON 88702 cotton, has activity against thrips and plant bugs, and will likely become an important management tool for early season pests in cotton. Determining its utility in cotton pest management requires understanding its effects on F. fusca and F. occidentalis. Individual adult female F. fusca and F. occidentalis were exposed to cotyledon disks cut from greenhouse-grown cotton expressing Cry51Aa2.834_16 (MON 88702) or a near-isoline (non-Bt) with or without an imidacloprid seed treatment. Insects were exposed for 72 h and mortality evaluated. Next, individually caged seedlings were infested with five adult female F. fusca or F. occidentalis and egg numbers counted after 72 h. Larval establishment determined after 10 days for F. fusca or 7 days for F. occidentalis. Exposure to MON 88702 in the absence of the imidacloprid seed treatment caused significant adult mortality in F. occidentalis. Exposure to the imidacloprid seed treatment caused significant adult mortality in both species on both MON 88702 and non-Bt cotton plants. Oviposition and larval establishment were reduced by both MON 88702 as well as imidacloprid seed treatment in both species, but the effect size differed between species. In F. fusca, the imidacloprid seed treatment caused the greatest reductions, whereas in F. occidentalis, MON 88702 had the greater effect.}, journal={Crop Protection}, publisher={Elsevier BV}, author={D'Ambrosio, Damon A. and Kennedy, George G. and Huseth, Anders S.}, year={2020}, month={Mar}, pages={105042} } @inbook{walgenbach_kennedy_huseth_2019, place={Raleigh, NC}, title={Insect control in vegetable crops}, url={https://content.ces.ncsu.edu/north-carolina-agricultural-chemicals-manual/insect-control}, booktitle={2019 North Carolina Agricultural Chemicals Manual}, publisher={North Carolina State Cooperative Extension}, author={Walgenbach, J.F. and Kennedy, G.G. and Huseth, A.S.}, year={2019} } @article{huseth_d′ambrosio_yorke_head_kennedy_2019, title={Novel mechanism of thrips suppression by Cry51Aa2.834_16 Bt toxin expressed in cotton}, volume={76}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.5664}, DOI={10.1002/ps.5664}, abstractNote={AbstractBACKGROUNDGenetically engineered (GE) crops that express insecticidal traits have improved the sustainability of insect pest management worldwide, but many important pest orders are not controlled by commercially available toxins. Development of the first transgenic thysanopteran‐ and hemipteran‐active Bacillus thuringiensis (Bt) Cry51Aa2.834_16 toxin expressed in MON 88702 cotton will significantly expand the diversity of pests controlled in the crop. Here, we examined MON 88702 cotton activity against two thrips species within the same genera, Frankliniella fusca and Frankliniella occidentalis. We used a multi‐component cotton tissue assay approach to understand effects on adult longevity, fecundity, and larval development.RESULTSWe found that in no‐choice assays, cotton plants expressing MON 88702 suppress oviposition, when compared to a non‐Bt cotton. MON 88702 did not kill a large proportion of F. fusca larvae or adults but killed most F. occidentalis larvae. Time series experiments with F. occidentalis larvae documented significant developmental lags for MON 88702 exposed individuals. We also found that female thrips preferred to oviposit on non‐Bt cotton when provided a choice.CONCLUSIONTogether these results describe the activity of MON 88702 against thrips. They document clear differences in toxin performance between different thrips species and throughout the insects' life cycle. Most importantly, we show that MON 88702 was associated with reduced oviposition via behavioral avoidance to the toxin. This is a novel mechanism of action for pest control for a Bt crop plant. Together, these results provide a basis to describe the mechanism of population control for MON 88702 cotton. © 2019 Society of Chemical Industry}, number={4}, journal={Pest Management Science}, publisher={Wiley}, author={Huseth, Anders S and D′Ambrosio, Damon A and Yorke, Benjamin T and Head, Graham P and Kennedy, George G}, year={2019}, month={Nov}, pages={1492–1499} } @book{huseth_reisig_2019, place={Raleigh, NC}, title={Planning for thrips infestations in 2019 cotton}, url={https://cotton.ces.ncsu.edu/2019/04/planning-for-thrips-infestations-in-2019-cotton-huseth-reisig/}, institution={North Carolina Cooperative Extension}, author={Huseth, As and Reisig, Dd}, year={2019}, month={Apr} } @article{d'ambrosio_peele_hubers_huseth_2019, title={Seasonal dispersal of Lygus lineolaris (Hemiptera: Miridae) from weedy hosts into differently fragmented cotton landscapes in North Carolina}, volume={125}, ISSN={0261-2194}, url={http://dx.doi.org/10.1016/j.cropro.2019.104898}, DOI={10.1016/j.cropro.2019.104898}, abstractNote={The timing and location of Lygus lineolaris (Palisot de Beauvois) dispersal into cotton is important to accurate and effective scouting and management. In the spring, L. lineolaris populations develop on non-crop weeds surrounding cotton fields. As weeds senesce, L. lineolaris migrate into susceptible cotton at the squaring stage. Given this predictable temporal colonization pattern, scouting efforts to inform insecticide interventions may be improved with a spatiotemporally targeted sampling recommendation. Using a geospatial approach, we tracked L. lineolaris populations at 352 unique sites along transects located in commercial North Carolina cotton fields over two consecutive years. Standardized sweep samples of L. lineolaris adults and nymphs were taken at each site. To relate the abundance of L. lineolaris to the spatial structure of cotton fields, the distance of the sample from the field edge and the edge-to-area ratio of each field were analyzed using GIS. All counts were related to accumulated degree days at each sample time to document seasonal progression of L. lineolaris abundance and temporal host utilization (i.e., weeds vs. cotton). Counts were also related to spatially structured scouting recommendations used in North Carolina. Nymph counts were significantly affected by accumulated degree days and distance from field edge. Higher adult counts were found in fragmented fields with greater edge-to-area ratios. Our results show that L. lineolaris nymphs were more spatiotemporally variable than adults, thereby being more likely to affect scouting accuracy when using sweep samples alone. We found that samples closer to the field edge likely increase the probability of being over the North Carolina L. lineolaris threshold.}, journal={Crop Protection}, publisher={Elsevier BV}, author={D'Ambrosio, Damon A. and Peele, William and Hubers, Allen and Huseth, Anders S.}, year={2019}, month={Nov}, pages={104898} } @article{chappell_huseth_kennedy_2019, title={Stability of neonicotinoid sensitivity in Frankliniella fusca populations found in agroecosystems of the southeastern USA}, volume={75}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.5319}, DOI={10.1002/ps.5319}, abstractNote={AbstractBACKGROUNDInsecticide resistance arises at a given location in response to selection acting on novel genotypes or standing variation, or allelic migration. Fitness costs of resistance may slow resistance evolution or result in reversion to susceptibility, but consistent and geographically widespread use of insecticides may provide sufficient selection to offset the fitness costs of resistance. Understanding this relationship is important to the success of insecticide resistance management. We report the existence of fitness costs of neonicotinoid resistance in field‐collected populations of the tobacco thrips (Frankliniella fusca), which increasingly challenge upland cotton production in the southeastern USA.RESULTSPopulations (14 of 15 in 2015; 4 of 5 in 2016) investigated showed a loss of resistance to imidacloprid after multiple generations without exposure to the insecticide. Populations studied in 2016 were each split into two colonies, and one of each pair was repeatedly exposed to imidacloprid. In three of the four populations that lost resistance, imidacloprid‐exposed colonies lost resistance significantly more slowly than did corresponding unexposed colonies.CONCLUSIONFor imidacloprid resistance to be broadly increasing in the landscapes of the southeastern USA despite fitness costs of resistance, selection for resistance must be sufficient to overcome the costs. Findings encourage investigation into why costs are overcome in this system, potentially including geographic extent of neonicotinoid use or prevalence of low‐dose exposure. © 2019 Society of Chemical Industry}, number={6}, journal={Pest Management Science}, publisher={Wiley}, author={Chappell, Thomas M and Huseth, Anders S and Kennedy, George G}, year={2019}, month={Feb}, pages={1539–1545} } @book{huseth_reisig_2019, place={Raleigh, NC}, title={Update on thrips damage in cotton: insecticide resistance or reduced neonicotinoid protection?}, url={https://cotton.ces.ncsu.edu/2019/05/update-on-thrips-damage-in-cotton-insecticide-resistance-or-reduced-neonicotinoid-protection-huseth-reisig-collins/}, institution={North Carolina Cooperative Extension}, author={Huseth, As and Reisig, Dd}, year={2019}, month={May} } @article{clements_schoville_clements_amezian_davis_sanchez-sedillo_bradfield_huseth_groves_2018, title={Agricultural fungicides inadvertently influence the fitness of Colorado potato beetles, Leptinotarsa decemlineata, and their susceptibility to insecticides}, volume={8}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/s41598-018-31663-4}, DOI={10.1038/s41598-018-31663-4}, abstractNote={AbstractThe Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is an agricultural pest of solanaceous crops which has developed insecticide resistance at an alarming rate. Up to this point, little consideration has been given to unintended, or inadvertent effects that non-insecticide xenobiotics may have on insecticide susceptibility in L. decemlineata. Fungicides, such as chlorothalonil and boscalid, are often used to control fungal pathogens in potato fields and are applied at regular intervals when L. decemlineata populations are present in the crop. In order to determine whether fungicide use may be associated with elevated levels of insecticide resistance in L. decemlineata, we examined phenotypic responses in L. decemlineata to the fungicides chlorothalonil and boscalid. Using enzymatic and transcript abundance investigations, we also examined modes of molecular detoxification in response to both insecticide (imidacloprid) and fungicide (boscalid and chlorothalonil) application to more specifically determine if fungicides and insecticides induce similar metabolic detoxification mechanisms. Both chlorothalonil and boscalid exposure induced a phenotypic, enzymatic and transcript response in L. decemlineata which correlates with known mechanisms of insecticide resistance.}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Clements, Justin and Schoville, Sean and Clements, Anna and Amezian, Dries and Davis, Tabatha and Sanchez-Sedillo, Benjamin and Bradfield, Christopher and Huseth, Anders S. and Groves, Russell L.}, year={2018}, month={Sep} } @book{reisig_huseth_collins_2018, place={Raleigh, NC}, title={At-planting thrips insecticide recommendations for cotton}, url={https://cotton.ces.ncsu.edu/2018/04/at-planting-thrips-insecticide-recommendations-for-cotton-reisig-huseth-collins/}, institution={North Carolina Cooperative Extension}, author={Reisig, D.D. and Huseth, A.S. and Collins, G.}, year={2018}, month={Apr} } @article{karp_chaplin-kramer_meehan_martin_declerck_grab_gratton_hunt_larsen_martínez-salinas_et al._2018, title={Crop pests and predators exhibit inconsistent responses to surrounding landscape composition}, volume={115}, ISSN={0027-8424 1091-6490}, url={http://dx.doi.org/10.1073/pnas.1800042115}, DOI={10.1073/pnas.1800042115}, abstractNote={Significance Decades of research have fostered the now-prevalent assumption that noncrop habitat facilitates better pest suppression by providing shelter and food resources to the predators and parasitoids of crop pests. Based on our analysis of the largest pest-control database of its kind, noncrop habitat surrounding farm fields does affect multiple dimensions of pest control, but the actual responses of pests and enemies are highly variable across geographies and cropping systems. Because noncrop habitat often does not enhance biological control, more information about local farming contexts is needed before habitat conservation can be recommended as a viable pest-suppression strategy. Consequently, when pest control does not benefit from noncrop vegetation, farms will need to be carefully comanaged for competing conservation and production objectives.}, number={33}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Karp, Daniel S. and Chaplin-Kramer, Rebecca and Meehan, Timothy D. and Martin, Emily A. and DeClerck, Fabrice and Grab, Heather and Gratton, Claudio and Hunt, Lauren and Larsen, Ashley E. and Martínez-Salinas, Alejandra and et al.}, year={2018}, month={Aug}, pages={E7863–E7870} } @article{d’ambrosio_huseth_kennedy_2018, title={Determining Frankliniella fusca (Thysanoptera: Thripidae) Egg Distribution in Neonicotinoid Seed-Treated Cotton}, volume={112}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/toy393}, DOI={10.1093/jee/toy393}, abstractNote={Abstract Frankliniella fusca (Hinds) (Thysanoptera: Thripidae) is an early-season cotton pest. Seedlings are injured by larvae, which hatch from eggs oviposited into seedlings and feed on developing plant tissue. Better understanding F. fusca oviposition in cotton may improve their management and address new challenges such as resistance to neonicotinoid seed treatments (NSTs). Cotton seedlings exposed to F. fusca were either cleared and stained to determine egg density and location, or dissected and washed to determine larval distribution. Experiments were conducted in the greenhouse with a susceptible population and field with a NST-resistant population. Eggs of both populations were recovered predominantly in cotyledons. Larvae were more uniformly distributed on seedlings. On NST seedlings, oviposition by the susceptible population was reduced and preference shifted to true leaves. NSTs did not alter egg placement by the resistant population. These findings suggest that injury to cotton seedlings is primarily caused by F. fusca emerging on the cotyledons, and then moving to developing leaves. The oviposition shift in NST plants correlates with how systemic NSTs have been reported to concentrate in cotyledons. This can better inform management tactics in cotton, such as well-timed foliar sprays, which, given the current resistance issue, are needed to maintain effective thrips management.}, number={2}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={D’Ambrosio, Damon A and Huseth, Anders S and Kennedy, George G}, year={2018}, month={Dec}, pages={827–834} } @article{d'ambrosio_huseth_kennedy_2018, title={Evaluation of alternative mode of action insecticides in managing neonicotinoid-resistant Frankliniella fusca in cotton}, volume={113}, ISSN={0261-2194}, url={http://dx.doi.org/10.1016/J.CROPRO.2018.07.011}, DOI={10.1016/J.CROPRO.2018.07.011}, abstractNote={Frankliniella fusca (Hinds) resistance to neonicotinoid seed treatments (NSTs) used in cotton has created a need for more diverse insecticide options targeting thrips. Alternative insecticides must protect seedlings while they are most vulnerable to F. fusca injury (emergence through five true leaves). In this study, we evaluated non-neonicotinoid foliar insecticide sprays currently registered for use on cotton against a neonicotinoid resistant F. fusca population. During two-seasons, we compared NSTs (imidacloprid, imidacloprid + thiodicarb, and thiamethoxam) to non-neonicotinoid foliar sprays of acephate, spinetoram, abamectin, cyantraniliprole, and cyantraniliprole + abamectin in field trials to evaluate their efficacy against a neonicotinoid resistant F. fusca population. Applications were made to both early- and full-maturity cotton varieties (Stoneville 4946GLB2 & 6448GLB2) to examine F. fusca larval establishment, plant vigor, and seed cotton yield. With the exception of abamectin, foliar insecticide treatments consistently reduced F. fusca larval numbers and minimized true leaf damage at a level equal to or greater than NSTs. Yield was not affected by insecticide treatment. Non-neonicotinoid foliar sprays have utility in managing neonicotinoid-resistant F. fusca and should be recommended to alleviate selection pressure against NSTs in cotton and unnecessary economic losses due to ineffective NST use against resistant F. fusca populations.}, journal={Crop Protection}, publisher={Elsevier BV}, author={D'Ambrosio, Damon A. and Huseth, Anders S. and Kennedy, George G.}, year={2018}, month={Nov}, pages={56–63} } @article{huseth_chappell_chitturi_jacobson_kennedy_2018, title={Insecticide Resistance Signals Negative Consequences of Widespread Neonicotinoid Use on Multiple Field Crops in the U.S. Cotton Belt}, volume={52}, ISSN={0013-936X 1520-5851}, url={http://dx.doi.org/10.1021/acs.est.7b06015}, DOI={10.1021/acs.est.7b06015}, abstractNote={The intensification of industrial agriculture has been enabled by improved crop varieties, genetically engineered crops, fertilizers, and pesticides. Over the past 15 years, neonicotinoid seed treatments have been adopted worldwide and are used on a large proportion of U.S. field crops. Although neonicotinoids are used widely, little is known about how large-scale deployment affects pest populations over long periods. Here, we report a positive relationship between the deployment of neonicotinoid seed-dressings on multiple crops and the emergence of insecticide resistance in tobacco thrips (Frankliniella fusca), a polyphagous insect herbivore that is an important pest of seedling cotton but not soybean or maize. Using a geospatial approach, we studied the relationship between neonicotinoid resistance measured in 301 F. fusca populations to landscape-scale crop production patterns across nine states in the southeastern U.S. cotton production region, in which soybean, maize and cotton are the dominant crops. Our research linked the spatiotemporal abundance of cotton and soybean production to neonicotinoid resistance in F. fusca that is leading to a dramatic increase in insecticide use in cotton. Results demonstrate that cross-crop resistance selection has important effects on pests and, in turn, drives pesticide use and increases environmental impacts associated with their use.}, number={4}, journal={Environmental Science & Technology}, publisher={American Chemical Society (ACS)}, author={Huseth, Anders S. and Chappell, Thomas M. and Chitturi, Anitha and Jacobson, Alana L. and Kennedy, George G.}, year={2018}, month={Feb}, pages={2314–2322} } @article{reisig_huseth_bacheler_aghaee_braswell_burrack_flanders_greene_herbert_jacobson_et al._2018, title={Long-Term Empirical and Observational Evidence of Practical Helicoverpa zea Resistance to Cotton With Pyramided Bt Toxins}, volume={111}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/toy106}, DOI={10.1093/jee/toy106}, abstractNote={Abstract Evidence of practical resistance of Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) to Bt cotton in the United States is debatable, supported with occasional reports of boll damage in the field. Our objective was to provide both empirical and long-term observational evidence of practical resistance by linking both in-season and end-of-season measurements of H. zea damage to pyramided Bt cotton bolls and to provide Cry1Ac diet-based bioassay data in support of these damage estimates. In-season boll damage from H. zea was highly correlated to end-of-season damaged bolls. Across North Carolina, Bt cotton fields with end-of-season bolls damaged by H. zea increased during 2016 compared to previous years. Elevated damage was coupled with an increase in field sprays targeting H. zea during 2016, but not related to an increase in H. zea abundance. Bioassay data indicated that there was a range of Cry1Ac susceptibility across the southeastern United States. Given the range of susceptibility to Cry1Ac across the southeastern United States, it is probable that resistant populations are common. Since H. zea is resistant to cotton expressing pyramided Cry toxins, the adoption of new cotton varieties expressing Vip3Aa will be rapid. Efforts should be made to delay resistance of H. zea to the Vip3Aa toxin to avoid foliar insecticide use.}, number={4}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Reisig, Dominic D and Huseth, Anders S and Bacheler, Jack S and Aghaee, Mohammad-Amir and Braswell, Lewis and Burrack, Hannah J and Flanders, Kathy and Greene, Jeremy K and Herbert, D Ames and Jacobson, Alana and et al.}, year={2018}, month={Apr}, pages={1824–1833} } @article{d'ambrosio_huseth_kennedy_2018, title={Temporal efficacy of neonicotinoid seed treatments against Frankliniella fusca on cotton}, volume={74}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.4907}, DOI={10.1002/ps.4907}, abstractNote={AbstractBACKGROUNDReports of neonicotinoid seed treatment (NST) failure against Frankliniella fusca in the mid‐south and southeastern USA led to the discovery of widespread resistance in these insect populations. Previous studies of NSTs in other crops have shown the concentration of the insecticide to change over time, which could reduce its efficacy. To understand this temporal effect in cotton with F. fusca, our study examined how plant age alters the effects of NSTs (imidacloprid, imidacloprid + thiodicarb and thiamethoxam) by examining larval establishment at multiple seedling ages during the period of cotton seedling susceptibility to this insect. Additionally, we used F. fusca populations with differing neonicotinoid sensitivity levels to understand how resistance impacts this changing efficacy.RESULTSGreenhouse studies showed that larval numbers were significantly greater on older NST‐grown cotton seedlings. The population with elevated neonicotinoid resistance had a more rapid increase in larval number on thiamethoxam‐treated plants over time.CONCLUSIONNSTs reduce the number of F. fusca larvae on younger seedlings, but this effect declines as seedlings age. The duration of efficacy is shorter against neonicotinoid‐resistant populations. Neonicotinoid resistance in cotton‐infesting F. fusca populations may be accelerated by this time‐dependent decrease in efficacy, which likely encourages low‐dose exposure to these insecticides. © 2018 Society of Chemical Industry}, number={9}, journal={Pest Management Science}, publisher={Wiley}, author={D'Ambrosio, Damon A and Huseth, Anders S and Kennedy, George G}, year={2018}, month={Apr}, pages={2110–2115} } @article{bradford_huseth_groves_2018, title={Widespread detections of neonicotinoid contaminants in central Wisconsin groundwater}, volume={13}, ISSN={1932-6203}, url={http://dx.doi.org/10.1371/journal.pone.0201753}, DOI={10.1371/journal.pone.0201753}, abstractNote={Neonicotinoids are a popular and widely-used class of insecticides whose heavy usage rates and purported negative impacts on bees and other beneficial insects has led to questions about their mobility and accumulation in the environment. Neonicotinoid compounds are currently registered for over 140 different crop uses in the United States, with commercial growers continuing to rely heavily on neonicotinoid insecticides for the control of key insect pests through a combination of in-ground and foliar applications. In 2008, the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) began testing for neonicotinoids in groundwater test wells in the state, reporting detections of one or more neonicotinoids in dozens of shallow groundwater test wells. In 2011, similar detection levels were confirmed in several high-capacity overhead center-pivot irrigation systems in central Wisconsin. The current study was initiated to investigate the spatial extent and magnitude of neonicotinoid contamination in groundwater in and around areas of irrigated commercial agriculture in central Wisconsin. From 2013–2015 a total of 317 samples were collected from 91 unique high-capacity irrigation wells and tested for the presence of thiamethoxam (TMX), a neonicotinoid, using enzyme-linked immunosorbent assays. 67% of all samples were positive for TMX at a concentration above the analytical limit of quantification (0.05 μg/L) and 78% of all wells tested positive at least once. Mean detection was 0.28 μg/L, with a maximum detection of 1.67 μg/L. Five wells had at least one detection exceeding 1.00 μg/L. Furthermore, an analysis of the spatial structure of these well detects suggests that contamination profiles vary across the landscape, with differences in mean detection levels observed from landscape (25 km), to farm (5 km), to individual well (500 m) scales. We also provide an update of DATCP’s neonicotinoid monitoring in Wisconsin’s shallow groundwater test wells and private potable wells for the years 2011–2017.}, number={10}, journal={PLOS ONE}, publisher={Public Library of Science (PLoS)}, author={Bradford, Benjamin Z. and Huseth, Anders S. and Groves, Russell L.}, editor={Ng, Carla A.Editor}, year={2018}, month={Oct}, pages={e0201753} } @article{huseth_d'ambrosio_kennedy_2017, title={Responses of neonicotinoid resistant and susceptible Frankliniella fusca life stages to multiple insecticide groups in cotton}, volume={73}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.4590}, DOI={10.1002/ps.4590}, abstractNote={AbstractBACKGROUNDDetection of neonicotinoid resistance in populations of tobacco thrips, Frankliniella fusca Hinds, throughout the southeastern USA has motivated an examination of alternative insecticides to control problematic infestations on seedling cotton. The objective of this study was to refine understanding of stage‐specific mortality and reduced oviposition of several common insecticides (acephate, abamectin, cyantraniliprole, spinetoram, imidacloprid, imidacloprid+thiodicarb, thiamethoxam) on neonicotinoid resistant and susceptible F. fusca populations under laboratory and field conditions.RESULTSLaboratory studies revealed that the average number of eggs per female and larval or adult survivorship responses differed by insecticide and were dependent on the resistance status of the population. In the presence of neonicotinoids, the resistant F. fusca populations exhibited lower mortality and higher egg counts than the susceptible population. In the field study, similar patterns of oviposition suppression were observed, indicating that some insecticides may impact reproductive rate.CONCLUSIONThis study shows that insecticides have different effects on F. fusca oviposition events, larval and adult mortality that are dependent on neonicotinoid resistance status. Because insecticides tested in this study have varied activity on specific F. fusca life stages (e.g. oviposition suppression, larvicidal activity, adulticidal activity), knowledge of stage‐specific activity can be used to improve control and enhance long‐term product stewardship. © 2017 Society of Chemical Industry}, number={10}, journal={Pest Management Science}, publisher={Wiley}, author={Huseth, Anders S and D'Ambrosio, Damon A and Kennedy, George G}, year={2017}, month={Jul}, pages={2118–2130} } @book{reisig_kennedy_chappell_huseth_2017, place={Raleigh, NC}, title={Use the thrips forecasting tool to make pre-plant management decisions}, url={https://cotton.ces.ncsu.edu/2017/04/use-the-thrips-forecasting-tool-to-make-preplant-management-decisions-kennedy-chappell-huseth-reisig/}, institution={North Carolina Cooperative Extension}, author={Reisig, D.D. and Kennedy, G.G. and Chappell, T. and Huseth, A.S.}, year={2017}, month={Apr} } @book{huseth_2016, title={ESA Position Statement on Insecticide Resistance Management}, institution={Entomology Society of America}, author={Huseth, A.}, year={2016} } @article{schmidt-jeffris_huseth_nault_2016, title={Estimating E-Race European Corn Borer (Lepidoptera: Crambidae) Adult Activity in Snap Bean Fields Based on Corn Planting Intensity and Their Activity in Corn in New York Agroecosystems}, volume={109}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/tow149}, DOI={10.1093/jee/tow149}, abstractNote={Abstract European corn borer, Ostrinia nubilalis (Hübner), is a major pest of processing snap bean because larvae are contaminants in pods. The incidence of O. nubilalis-contaminated beans has become uncommon in New York, possibly because widespread adoption of Bt field corn has suppressed populations. Snap bean fields located where Bt corn has been intensively grown in space and time may be at lower risk for O. nubilalis than fields located where Bt corn is not common. To manage O. nubilalis infestation risk, growers determine insecticide application frequency in snap bean based on pheromone-trapping information in nearby sweet corn fields; adult activity is presumed equivalent in both crops. Our goal was to determine if corn planting intensity and adult activity in sweet corn could be used to estimate O. nubilalis populations in snap bean in New York in 2014-2015. Numbers of O nubilalis adults captured in pheromone-baited traps located in snap bean fields where corn was and was not intensively grown were similar, suggesting that O. nubilalis does not respond to local levels of Bt corn in the landscape. Numbers of Ostrinia nubilalis captured in pheromone-baited traps placed by snap bean fields and proximal sweet corn fields were not related, indicating that snap bean growers should no longer make control decisions based on adult activity in sweet corn. Our results also suggest that the risk of O. nubilalis infestations in snap bean is low (∼80% of the traps caught zero moths) and insecticide applications targeting this pest should be reduced or eliminated.}, number={5}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Schmidt-Jeffris, Rebecca A. and Huseth, Anders S. and Nault, Brian A.}, year={2016}, month={Jul}, pages={2210–2214} } @article{nault_huseth_2016, title={Evaluating an Action Threshold-Based Insecticide Program on Onion Cultivars Varying in Resistance to Onion Thrips (Thysanoptera: Thripidae)}, volume={109}, ISSN={0022-0493 1938-291X}, url={http://dx.doi.org/10.1093/jee/tow112}, DOI={10.1093/jee/tow112}, abstractNote={Abstract Onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), is a highly destructive pest of onion, Allium cepa L., and its management relies on multiple applications of foliar insecticides. Development of insecticide resistance is common in T. tabaci populations, and new strategies are needed to relax existing levels of insecticide use, but still provide protection against T. tabaci without compromising marketable onion yield. An action threshold-based insecticide program combined with or without a thrips-resistant onion cultivar was investigated as an improved approach for managing T. tabaci infestations in commercial onion fields. Regardless of cultivar type, the average number of insecticide applications needed to manage T. tabaci infestations in the action-threshold based program was 4.3, while the average number of sprays in the standard weekly program was 7.2 (a 40% reduction). The mean percent reduction in numbers of applications following the action threshold treatment in the thrips-resistant onion cultivar, ‘Advantage’, was 46.7% (range 40–50%) compared with the standard program, whereas the percentage reduction in applications in action threshold treatments in the thrips-susceptible onion cultivar, ‘Santana’, was 34.3% (range 13–50%) compared with the standard program, suggesting a benefit of the thrips-resistant cultivar. Marketable bulb yields for both ‘Advantage’ and ‘Santana’ in the action threshold-based program were nearly identical to those in the standard program, indicating that commercially acceptable bulb yields will be generated with fewer insecticide sprays following an action threshold-based program, saving money, time and benefiting the environment.}, number={4}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Nault, Brian A. and Huseth, Anders S.}, year={2016}, month={Jun}, pages={1772–1778} } @article{huseth_chappell_langdon_morsello_martin_greene_herbert_jacobson_reay‐jones_reed_et al._2016, title={Frankliniella fusca resistance to neonicotinoid insecticides: an emerging challenge for cotton pest management in the eastern United States}, volume={72}, ISSN={1526-498X 1526-4998}, url={http://dx.doi.org/10.1002/ps.4232}, DOI={10.1002/ps.4232}, abstractNote={AbstractBACKGROUNDOver the past two decades, neonicotinoid seed treatments have become the primary method to manage tobacco thrips, Frankliniella fusca Hinds, on seedling cotton. Because this insect is highly polyphagous and the window of insecticide exposure is short, neonicotinoid resistance was expected to pose a minimal risk. However, reports of higher than expected F. fusca seedling damage in seed‐treated cotton fields throughout the Mid‐South and Southeast US production regions suggested neonicotinoid resistance had developed. To document this change, F. fusca populations from 86 different locations in the eastern United States were assayed in 2014 and 2015 for imidacloprid and thiamethoxam resistance to determine the extent of the issue in the region.RESULTSApproximately 57 and 65% of the F. fusca populations surveyed had reduced imidacloprid and thiamethoxam sensitivity respectively. Survivorship in diagnostic bioassays was significantly different at both the state and regional scales. Multiple‐dose bioassays conducted on 37 of the populations documented up to 55‐ and 39‐fold resistance ratios for imidacloprid and thiamethoxam respectively.CONCLUSIONEstimates of neonicotinoid resistance indicate an emerging issue for management of F. fusca in the eastern United States. Significant variation in survivorship within states and regions indicated that finer‐scale surveys were needed to determine factors (genetic, insecticide use) driving resistance evolution. © 2016 Society of Chemical Industry}, number={10}, journal={Pest Management Science}, publisher={Wiley}, author={Huseth, Anders S and Chappell, Thomas M and Langdon, Kevin and Morsello, Shannon C and Martin, Scott and Greene, Jeremy K and Herbert, Ames and Jacobson, Alana L and Reay‐Jones, Francis PF and Reed, Timothy and et al.}, year={2016}, month={Feb}, pages={1934–1945} } @book{reisig_huseth_kennedy_greene_reay-jones_roberts_toews_smith_reed_jacobson_et al._2016, title={Managing thrips in cotton: research in the Southeast region}, institution={Virginia Cooperative Extension}, author={Reisig, D.D. and Huseth, A.S. and Kennedy, G.G. and Greene, J.K. and Reay-Jones, F.P.F. and Roberts, P.M. and Toews, M. and Smith, R. and Reed, T. and Jacobson, A.L. and et al.}, year={2016} } @article{clements_schoville_peterson_huseth_lan_groves_2017, title={RNA interference of three up-regulated transcripts associated with insecticide resistance in an imidacloprid resistant population of Leptinotarsa decemlineata}, volume={135}, ISSN={0048-3575}, url={http://dx.doi.org/10.1016/j.pestbp.2016.07.001}, DOI={10.1016/j.pestbp.2016.07.001}, abstractNote={The Colorado potato beetle, Leptinotarsa decemlineata (Say), is a major agricultural pest of potatoes in the Central Sands production region of Wisconsin. Previous studies have shown that populations of L. decemlineata have become resistant to many classes of insecticides, including the neonicotinoid insecticide, imidacloprid. Furthermore, L. decemlineata has multiple mechanisms of resistance to deal with a pesticide insult, including enhanced metabolic detoxification by cytochrome p450s and glutathione S-transferases. With recent advances in the transcriptomic analysis of imidacloprid susceptible and resistant L. decemlineata populations, it is possible to investigate the role of candidate genes involved in imidacloprid resistance. A recently annotated transcriptome analysis of L. decemlineata was obtained from select populations of L. decemlineata collected in the Central Sands potato production region, which revealed a subset of mRNA transcripts constitutively up-regulated in resistant populations. We hypothesize that a portion of the up-regulated transcripts encoding for genes within the resistant populations also encode for pesticide resistance and can be suppressed to re-establish a susceptible phenotype. In this study, a discrete set of three up-regulated targets were selected for RNA interference experiments using a resistant L. decemlineata population. Following the successful suppression of transcripts encoding for a cytochrome p450, a cuticular protein, and a glutathione synthetase protein in a select L. decemlineata population, we observed reductions in measured resistance to imidacloprid that strongly suggest these genes control essential steps in imidacloprid metabolism in these field populations.}, journal={Pesticide Biochemistry and Physiology}, publisher={Elsevier BV}, author={Clements, Justin and Schoville, Sean and Peterson, Nathan and Huseth, Anders S. and Lan, Que and Groves, Russell L.}, year={2017}, month={Jan}, pages={35–40} } @article{huseth_groves_chapman_nault_2015, title={Evaluation of diamide insecticides co-applied with other agrochemicals at various times to manageOstrinia nubilalisin processing snap bean}, volume={71}, ISSN={1526-498X}, url={http://dx.doi.org/10.1002/PS.3973}, DOI={10.1002/PS.3973}, abstractNote={BACKGROUND Multiple applications of pyrethroid insecticides are used to manage European corn borer, Ostrinia nubilalis Hübner, in snap bean, but new diamide insecticides may reduce application frequency. In a 2 year small-plot study, O. nubilalis control was evaluated by applying cyantraniliprole (diamide) and bifenthrin (pyrethroid) insecticides at one of three phenological stages (bud, bloom and pod formation) of snap bean development. Co-application of these insecticides with either herbicides or fungicides was also examined as a way to reduce the total number of sprays during a season. RESULTS Cyantraniliprole applications timed either during bloom or during pod formation controlled O. nubilalis better than similar timings of bifenthrin. Co-applications of insecticides with fungicides controlled O. nubilalis as well as insecticide applications alone. Insecticides applied either alone or with herbicides during bud stage did not control this pest. CONCLUSION Diamides are an alternative to pyrethroids for the management of O. nubilalis in snap bean. Adoption of diamides by snap bean growers could improve the efficiency of production by reducing the number of sprays required each season.}, number={12}, journal={Pest Management Science}, publisher={Wiley}, author={Huseth, Anders S and Groves, Russell L and Chapman, Scott A and Nault, Brian A}, year={2015}, month={Jan}, pages={1649–1656} } @article{huseth_petersen_poveda_szendrei_nault_kennedy_groves_2015, title={Spatial and Temporal Potato Intensification Drives Insecticide Resistance in the Specialist Herbivore, Leptinotarsa decemlineata}, volume={10}, ISSN={1932-6203}, url={http://dx.doi.org/10.1371/journal.pone.0127576}, DOI={10.1371/journal.pone.0127576}, abstractNote={Landscape-scale intensification of individual crops and pesticide use that is associated with this intensification is an emerging, environmental problem that is expected to have unequal effects on pests with different lifecycles, host ranges, and dispersal abilities. We investigate if intensification of a single crop in an agroecosystem has a direct effect on insecticide resistance in a specialist insect herbivore. Using a major potato pest, Leptinotarsa decemlineata, we measured imidacloprid (neonicotinoid) resistance in populations across a spatiotemporal crop production gradient where potato production has increased in Michigan and Wisconsin, USA. We found that concurrent estimates of area and temporal frequency of potato production better described patterns of imidacloprid resistance among L. decemlineata populations than general measures of agricultural production (% cropland, landscape diversity). This study defines the effects individual crop rotation patterns can have on specialist herbivore insecticide resistance in an agroecosystem context, and how impacts of intensive production can be estimated with general estimates of insecticide use. Our results provide empirical evidence that variation in the intensity of neonicotinoid-treated potato in an agricultural landscape can have unequal impacts on L. decemlineata insecticide insensitivity, a process that can lead to resistance and locally intensive insecticide use. Our study provides a novel approach applicable in other agricultural systems to estimate impacts of crop rotation, increased pesticide dependence, insecticide resistance, and external costs of pest management practices on ecosystem health.}, number={6}, journal={PLOS ONE}, publisher={Public Library of Science (PLoS)}, author={Huseth, Anders S. and Petersen, Jessica D. and Poveda, Katja and Szendrei, Zsofia and Nault, Brian A. and Kennedy, George G. and Groves, Russell L.}, editor={Rodriguez-Saona, CesarEditor}, year={2015}, month={Jun}, pages={e0127576} } @article{huseth_rl_2015, title={Water quality - maybe the next 'hot potato'}, volume={65}, number={1}, journal={The Badger Common'Tater}, author={Huseth, A.S. and Rl, Groves}, year={2015} } @article{groves_chapman_huseth_crubaugh_frost_2014, title={EVALUATION OF SYSTEMIC INSECTICIDES FOR THE CONTROL OF COLORADO POTATO BEETLE, POTATO LEAFHOPPER, AND APHIDS IN POTATO, 2013}, volume={39}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2014.E11}, DOI={10.4182/amt.2014.E11}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Crubaugh, Linda K. and Frost, Kenneth E.}, year={2014}, month={Jan} } @article{huseth_groves_2014, title={Environmental Fate of Soil Applied Neonicotinoid Insecticides in an Irrigated Potato Agroecosystem}, volume={9}, ISSN={1932-6203}, url={http://dx.doi.org/10.1371/journal.pone.0097081}, DOI={10.1371/journal.pone.0097081}, abstractNote={Since 1995, neonicotinoid insecticides have been a critical component of arthropod management in potato, Solanum tuberosum L. Recent detections of neonicotinoids in groundwater have generated questions about the sources of these contaminants and the relative contribution from commodities in U.S. agriculture. Delivery of neonicotinoids to crops typically occurs as a seed or in-furrow treatment to manage early season insect herbivores. Applied in this way, these insecticides become systemically mobile in the plant and provide control of key pest species. An outcome of this project links these soil insecticide application strategies in crop plants with neonicotinoid contamination of water leaching from the application zone. In 2011 and 2012, our objectives were to document the temporal patterns of neonicotinoid leachate below the planting furrow following common insecticide delivery methods in potato. Leaching loss of thiamethoxam from potato was measured using pan lysimeters from three at-plant treatments and one foliar application treatment. Insecticide concentration in leachate was assessed for six consecutive months using liquid chromatography-tandem mass spectrometry. Findings from this study suggest leaching of neonicotinoids from potato may be greater following crop harvest in comparison to other times during the growing season. Furthermore, this study documented recycling of neonicotinoid insecticides from contaminated groundwater back onto the crop via high capacity irrigation wells. These results document interactions between cultivated potato, different neonicotinoid delivery methods, and the potential for subsurface water contamination via leaching.}, number={5}, journal={PLoS ONE}, publisher={Public Library of Science (PLoS)}, author={Huseth, Anders S. and Groves, Russell L.}, editor={Salice, Christopher J.Editor}, year={2014}, month={May}, pages={e97081} } @article{petersen_huseth_nault_2014, title={Evaluating Pollination Deficits in Pumpkin Production in New York}, volume={43}, ISSN={0046-225X 1938-2936}, url={http://dx.doi.org/10.1603/EN14085}, DOI={10.1603/en14085}, abstractNote={ABSTRACT Potential decreases in crop yield from reductions in bee-mediated pollination services threaten food production demands of a growing population. Many fruit and vegetable growers supplement their fields with bee colonies during crop bloom. The extent to which crop production requires supplementary pollination services beyond those provided by wild bees is not well documented. Pumpkin, Cucurbita pepo L., requires bee-mediated pollination for fruit development. Previous research identified the common eastern bumble bee, Bombus impatiens (Cresson), as the most efficient pumpkin pollinator. Two concomitant studies were conducted to examine pollination deficits in NewYork pumpkin fields from 2011 to 2013. In the first study, fruit weight, seed set, and B. impatiens visits to pumpkin flowers were compared across fields supplemented with B. impatiens colonies at a recommended stocking density of five colonies per hectare, a high density of 15 colonies per hectare, or not supplemented with bees. In the second study, fruit weight and seed set of pumpkins that received supplemental pollen through hand-pollination were compared with those that were openpollinated by wild bees. Results indicated that supplementing pumpkin fields with B. impatiens colonies, regardless of stocking density, did not increase fruit weight, seed set, or B. impatiens visits to pumpkin flowers. Fruit weight and seed set did not differ between hand- and open-pollinated treatments. In general, we conclude that pumpkin production in central New York is not limited by inadequate pollination services provided by wild bees and that on average, supplementation with B. impatiens colonies did not improve pumpkin yield.}, number={5}, journal={Environmental Entomology}, publisher={Oxford University Press (OUP)}, author={Petersen, J. D. and Huseth, A. S. and Nault, B. A.}, year={2014}, month={Oct}, pages={1247–1253} } @article{groves_chapman_huseth_crubaugh_frost_2014, title={FULL SEASON INSECTICIDE MANAGEMENT PROGRAMS FOR THE CONTROL OF COLORADO POTATO BEETLE IN WISCONSIN POTATO, 2013}, volume={39}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2014.E12}, DOI={10.4182/amt.2014.E12}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Crubaugh, Linda K. and Frost, Kenneth E.}, year={2014}, month={Jan} } @article{huseth_groves_chapman_alyokhin_kuhar_macrae_szendrei_nault_2014, title={Managing Colorado Potato Beetle Insecticide Resistance: New Tools and Strategies for the Next Decade of Pest Control in Potato}, volume={5}, ISSN={2155-7470 2155-7470}, url={http://dx.doi.org/10.1603/IPM14009}, DOI={10.1603/ipm14009}, abstractNote={Neonicotinoid insecticides have been the most common management tool for Colorado potato beetle, Leptinotarsa decemlineata (Say), infestations in cultivated potato for nearly 20 yr. The relative ease of applying neonicotinoids at planting coupled with inexpensive, generic neonicotinoid formulations has reduced the incentive for potato growers to transition from these products to other mode of action (MoA) groups for early-season L. decemlineata control. Continuous use of neonicotinoids has resulted in resistant L. decemlineata populations in some production areas of the eastern United States. Continued reliance on neonicotinoids will accelerate L. decemlineata resistance development and result in additional insecticide inputs to manage these populations. Resistance management recommendations for L. decemlineata have focused on rotation of insecticides within the growing season. Growers using at-plant neonicotinoids for early-season L. decemlineata control are encouraged to rotate MoAs for later generations to delay resistance development. Although this short-term insecticide rotation has likely prolonged the utility of neonicotinoid insecticides, reducing reliance on a single MoA soil application at planting will improve the longevity of newer, more reduced-risk alternatives. The objectives of this article are twofold: 1) to provide a review of the current status of L. decemlineata neonicotinoid resistance, and 2) to propose long-term resistance management strategies that arrange reduced-risk MoA groups into several, multiyear sequences that will maximize L. decemlineata control and reduce the probability for resistance development. This recommendation maintains practical and economical approaches for L. decemlineata control, but limits reliance on any single MoA group to minimize selection pressure for resistance development.}, number={4}, journal={Journal of Integrated Pest Management}, publisher={Oxford University Press (OUP)}, author={Huseth, Anders S. and Groves, Russell L. and Chapman, Scott A. and Alyokhin, Andrei and Kuhar, Thomas P. and Macrae, Ian V. and Szendrei, Zsofia and Nault, Brian A.}, year={2014}, month={Dec}, pages={1–8} } @article{huseth_nault_2014, title={Managing Colorado potato beetle insecticide resistance - new tools & strategies}, volume={10}, number={9}, journal={VEGEdge}, publisher={Cornell University Cooperative Extension}, author={Huseth, As and Nault, Ba}, year={2014}, pages={4} } @article{huseth_chapman_nault_groves_2014, title={Managing Colorado potato beetle insecticide resistance: new tools and strategies for the next decade}, volume={66}, number={7}, journal={The Badger Common'Tater}, author={Huseth, A.S. and Chapman, S.A. and Nault, B.A. and Groves, R.L.}, year={2014}, pages={10–13} } @inproceedings{huseth_nault_2014, title={Managing Colorado potato beetle neonicotinoid resistance: new tools and strategies for the next decade of pest control in potato}, booktitle={Proceedings of the Empire State Producers Expo}, publisher={New York State Vegetable Growers Association}, author={Huseth, As and Nault, Ba}, year={2014} } @article{nault_huseth_smith_2014, title={ONION THRIPS CONTROL IN ONION, 2013}, volume={39}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2014.E39}, DOI={10.4182/amt.2014.E39}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Nault, Brian A. and Huseth, Anders S. and Smith, Erik A.}, year={2014}, month={Jan} } @article{groves_chapman_huseth_crubaugh_frost_2014, title={REGISTERED AND EXPERIMENTAL FOLIAR INSECTICIDES TO CONTROL COLORADO POTATO BEETLE AND POTATO LEAFHOPPER IN POTATO, 2013}, volume={39}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2014.E10}, DOI={10.4182/amt.2014.E10}, abstractNote={Colorado potato beetle (CPB): Leptinotarsa decemlineata (Say) Potato leafhopper (PLH): Empoasca fabae (Harris)The objective of this experiment was to assess the efficacy of foliar insecticides applied to control insect pests in potato.The trial consisted of 33 main effect treatments arranged in an RCB design with four experimental replicates.Potato was machine planted on 1 May 2013 at the Hancock Agricultural Research Station in central Wisconsin.Experimental plots consisted of 2 row plots measuring 6 ft (1.8 m) wide and 20 ft (6.1 m) in length with unplanted guard rows on each side.Rows were planted on 36 inch row centers (0.9 m) with 12 inches (0.3 m) between plants with 12 ft (3.6 m) alleys separating replications.All foliar treatments were applied at 20 gpa using a four nozzle, 6 ft (1.8m) boom equipped with an XRVS 8002 flat fan spray tip powered by a CO 2 backpack sprayer operating at 30 psi.Nearly all of the foliar treatments, with the exception of the novaluron (Rimon 0.83EC) treatments, were applied twice in succession when 75-90% of the first generation CPB was within the first and second stadia.The foliar applications of novaluron were initiated on 7 and 14 Jun, two and one week earlier than all other treatments, respectively, for treatments that had 4 and 3 successive applications.The first foliar application of novaluron (applied at 6.0 fl oz/acre) occurred between 6:30 -6:40 hours on 7 Jun 2013, and application conditions were recorded as a south wind at 2.0 mph (3.2 kph), 65.4 o F (18.6 o C), 64% RH, under clear skies.The second set foliar applications of novaluron (applied at 6.0 and 9.0 fl oz/acre, on the final two experimental treatments) occurred between 8:30 -8:45 hours on 14 Jun 2013, and application conditions were recorded as a south wind at 5.5 mph (8.9 kph), 59.2 o F (15.1 o C), 55% RH, under partly cloudy skies.The third foliar application, in which the majority of all experimental treatments were initiated, occurred between 7:45 -9:30 hours on 21 Jun 2013, and application conditions were recorded as a southwest wind at 9.2 mph (14.8 kph), 60.1 o F (15.6 o C), 51% RH, under clear skies.Final applications for all experimental treatments occurred on 28 Jun 2013 between the hours of 7:00 -9:00.Application conditions were recorded as a west wind at 8.1 mph (13 kph), 64°F (17.8°C), 87% RH, under cloudy skies.All plots were maintained according to standard commercial practices.CPB adults (AD), egg masses (EM), small larvae (SL), large larvae (LL) as well as PLH adults and nymphs were assessed by counting the number of each life stage on 10 randomly selected plants from the center two rows in each plot.CPB counts occurred five times during Jun and Jul.The first set of counts occurred on 24 and 27 Jun (3 and 6 DAT) after the first application.The second set of counts occurred on 1-3 Jul, 10 and 16 Jul (4-6, 13 and 19 DAT) after the second application.Adult PLH counts were performed on 25 and 27 Jun and the remainder of the counts on the same dates.Count data were log 10(x+1) transformed prior to data analysis using ANOVA.Means were compared using the least significant difference option in an ANOVA.}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Crubaugh, Linda K. and Frost, Kenneth E.}, year={2014}, month={Jan} } @article{variable concentration of soil-applied insecticides in potato over time: implications for management of leptinotarsa decemlineata_2014, url={http://dx.doi.org/10.1002/ps.3740}, DOI={10.1002/ps.3740}, abstractNote={AbstractBACKGROUNDSelect populations of Colorado potato beetle, Leptinotarsa decemlineata, in Wisconsin have recently become resistant to soil‐applied neonicotinoids in potato. Sublethal insecticide concentrations persisting in foliage through the growing season may select for resistance over successive years of use. Over the 2 years of this study, the aim was to document the in‐plant insecticide concentrations over time that result from four different types of soil‐applied insecticide delivery for thiamethoxam and imidacloprid in potato, and to measure the impact upon L. decemlineata populations following treatments. After plant emergence, insect life stages were counted and plant tissue was assayed weekly for nine consecutive weeks using ELISA.RESULTSPeak concentration of both imidacloprid and thiamethoxam occurred in the first sample week following plant emergence. The average concentration of both insecticides dissipated sharply over time as the plant canopy expanded 50 days after planting in all delivery treatments. Both insecticides were detected at low levels during the later weeks of the study. Among‐plant concentrations of both neonicotinoids were highly variable throughout the season. Populations of L. decemlineata continued to develop and reproduce throughout the period of declining insecticide concentrations.CONCLUSIONSublethal, chronic exposure to soil‐applied systemic insecticides resulting from these delivery methods may accelerate selection for resistant insects in potato. © 2014 Society of Chemical Industry}, journal={Pest Management Science}, year={2014}, month={Dec} } @article{groves_chapman_huseth_groves_frost_2013, title={EVALUATION OF FOLIAR INSECTICIDES FOR THE CONTROL OF ONION THRIPS IN DRY-BULB ONION, 2012}, volume={38}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2013.E35}, DOI={10.4182/amt.2013.E35}, abstractNote={The objective of this experiment was to assess the efficacy of foliar insecticides applied at threshold levels for the control of immature stages of OT in dry-bulb onion. The trial consisted of 12 main effect treatments arranged in a randomized complete block (RCB) design with four experimental replicates. Onion was direct seeded on 5 May 2014 at Shiprock Farms, located 5.1 miles (8.1 km) west of Coloma, WI. Experimental plots consisted of 54 inch (1.4 m) raised formed beds containing 6 rows of onion …}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Groves, Carol L. and Frost, Kenneth E.}, year={2013}, month={Jan} } @article{huseth_groves_2013, title={Effect of Insecticide Management History on Emergence Phenology and Neonicotinoid Resistance in Leptinotarsa decemlineata (Coleoptera: Chrysomelidae)}, volume={106}, ISSN={0022-0493 0022-0493}, url={http://dx.doi.org/10.1603/EC13277}, DOI={10.1603/ec13277}, abstractNote={ABSTRACT Emergence phenology and fitness attributes of several Colorado potato beetle, Leptinotarsa decemlineata (Say), populations were measured under field and greenhouse conditions. Anecdotal observations by producers and pest managers in many locations of the upper Midwest increasingly suggested that select populations of Colorado potato beetle were emerging over a longer period in the spring and were less sensitive to systemic neonicotinoids in cultivated potato. These changes in emergence phenologymaybe related to changes in systemic insecticide concentration over time. Specifically, a prolonged period of adult emergence in the spring increases the potential of low-dose chronic exposure to systemic neonicotinoid insecticides in potato. In 2010 and 2011, our objectives were twofold: 1) establish a common garden experiment to compare the emergence phenology of Colorado potato beetle populations uniquely managed with variable insecticide inputs, and 2) measure postdormancy fitness of emerged adult beetles from among these selected populations. Cumulative adult emergence was modeled with logistic regression. Results from this study found no clear evidence for direct relationships between phenology and management history or resistance. Differences in reproductive capacity, sex ratio, and body size were apparent in some instances. However, these results did not uniformly correspond to one specific form of potato pest management tested here. In this study, long-term reliance on systemic insecticides for Colorado potato beetle control did not serve as a strong predictor for variable life history for selected populations in Wisconsin.}, number={6}, journal={Journal of Economic Entomology}, publisher={Oxford University Press (OUP)}, author={Huseth, A. S. and Groves, R. L.}, year={2013}, month={Dec}, pages={2491–2505} } @article{groves_chapman_huseth_groves_2013, title={Evaluation of In-Furrow Treatments for Control of European Corn Borer in Snap Bean, 2012}, volume={38}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2013.E1}, DOI={10.4182/amt.2013.E1}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Groves, Carol L.}, year={2013}, month={Jan}, pages={E1} } @article{groves_chapman_huseth_groves_frost_2013, title={FULL SEASON MANAGEMENT OF COLORADO POTATO BEETLE AND POTATO LEAFHOPPER IN POTATO, 2012}, volume={38}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2013.E51}, DOI={10.4182/amt.2013.E51}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders and Groves, Carol L. and Frost, Kenneth E.}, year={2013}, month={Jan} } @article{groves_chapman_huseth_groves_frost_2013, title={REGISTERED AND EXPERIMENTAL FOLIAR INSECTICIDES TO CONTROL COLORADO POTATO BEETLE AND POTATO LEAFHOPPER IN POTATO, 2012}, volume={38}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2013.E50}, DOI={10.4182/amt.2013.E50}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Huseth, Anders S. and Groves, Carol L. and Frost, Kenneth E.}, year={2013}, month={Jan} } @article{groves_chapman_frost_huseth_groves_2013, title={USE OF SYSTEMIC INSECTICIDES TO CONTROL COLORADO POTATO BEETLE AND POTATO LEAFHOPPER, 2012}, volume={38}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2013.E52}, DOI={10.4182/amt.2013.E52}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Frost, Kenneth E. and Huseth, Anders S. and Groves, Carol L.}, year={2013}, month={Jan} } @article{huseth_frost_knuteson_wyman_groves_2012, title={Effects of Landscape Composition and Rotation Distance on Leptinotarsa decemlineata (Coleoptera: Chrysomelidae) Abundance in Cultivated Potato}, volume={41}, ISSN={0046-225X 0046-225X}, url={http://dx.doi.org/10.1603/EN12128}, DOI={10.1603/en12128}, abstractNote={ABSTRACT Knowledge of the Colorado potato beetle's, Leptinotarsa decemlineata (Say), relationship to previous potato crops has contributed to the development of a pest management strategy focused upon crop rotation. Previous investigations revealed that potato rotations exceeding 0.4 km were effective in reducing colonization in current season potato. The current study examines the relationship between beetle abundance in potato (Solanum tuberosum L.) and distance from multiple, previous year potato fields in Wisconsin, and integrates information about the influence of natural habitats adjacent to previous season potato. Colorado potato beetle count data were collected in 1998 and 2008 and distance to previous potato, field areas, and landscape classes were estimated using maps from 1997 and 2007. Poisson regression was used to relate counts to combinations of distance and local landscape characteristics calculated for all fields within 1,500 m of sampled potato. In 1998, beetle counts measured in current season potato declined significantly with increasing distance from previous potato fields and field size did not influence these counts. However, there was no relationship between beetle abundance and distance to prior year potatoes in 2008. In both years, increased proportions of surrounding habitats, previously described as preferred for diapause sites (e.g., wooded field boundaries), did not relate significantly to counts. However, grassland habitat was negatively correlated with counts. Results indicate that distance from previous potato remains an important factor to reduce the magnitude of colonization. This analysis further suggests that certain landscape components (e.g., grassland) may influence infestation, which may be useful for refining future integrated pest management programs.}, number={6}, journal={Environmental Entomology}, publisher={Oxford University Press (OUP)}, author={Huseth, A. S. and Frost, K. E. and Knuteson, D. L. and Wyman, J. A. and Groves, R. L.}, year={2012}, month={Dec}, pages={1553–1564} } @inproceedings{huseth_groves_2012, title={Environmental fate of neonicotinoids}, volume={25}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Huseth, A.S. and Groves, R.L.}, year={2012}, pages={191–193} } @article{groves_chapman_lowenstein_huseth_groves_2012, title={Evaluation of Floiar Insecticides for the Control of Onion Thrips in Dry-Bulb Onion, 2011}, volume={37}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2012.E34}, DOI={10.4182/amt.2012.E34}, abstractNote={LindemanThe objective of this experiment was to assess the efficacy of foliar insecticides applied at threshold levels of immature stages of OT in dry-bulb onion.The trial consisted of 18 main effect treatments arranged in an RCBD with four experimental replicates.Onion was direct seeded on 2 May 2011 at Shiprock Farms, located 5.1 miles (8.1 km) west of Coloma, WI.Experimental plots consisted of 54 inch (1.4 m) raised formed beds containing 6 rows of onion spaced 9.8 inches (24.9 cm) between rows and 2.6 inches (6.6 cm) within rows.Experimental plots measured 25 ft (7.6 m) in length with planted beds on either side acting as guard rows.All foliar treatments were applied in 1.5 L of water at an application rate of 22.1 gpa using a four nozzle, 6 foot (1.8m) boom equipped with an XRVS 8002 flat fan spray tip powered by a CO2 backpack sprayer operating at 30 psi.Successive applications were initiated when mean immature thrips populations had exceeded established thresholds of 3 immature thrips / leaf.The foliar applications were applied on 25 July and 01 Aug. Application on 25 Jul occurred between 10:30-11:00 hours, and application conditions were recorded as southwest wind 1-2 mph (1.6-3.2 kph), 75° F (23.9° C) under sunny conditions.All plots were maintained to standard commercial practices.Immature life stages of OT were assessed by counting the number of larvae on 10 plants in the central 2 rows of each plot.Larval counts occurred four times during the summer on 28 Jul (3 DAT) and 1 Aug (7 DAT) after the first application, and again on 8 Aug (7 DAT) and 17 Aug (16 DAT) after the second application.Yield and onion bulb size were measured for selected treatments on 29 Aug. Count data were log 10 transformed prior to analysis.Data were analyzed using ANOVA and means were separated with a Fisher's Protected LSD.In the experimental field, none of the treatments led to efficient control of OT relative to the untreated check except at the final sampling date of 17 Aug (Table 1).Carzol and Radiant were most effective at suppressing OT at this date.There was no immediate knockdown of OT in treatments soonest after application.There were no significant differences in yield or onion bulb size between treatments (Table 2).No overt signs of phototoxicity were observed.}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Lowenstein, David M. and Huseth, Anders S. and Groves, Carol L.}, year={2012}, month={Jan}, pages={E34} } @article{groves_chapman_lowenstein_huseth_groves_2012, title={Evaluation of In-Furrow Treatments for Control of European Corn Borer in Snap Bean, 2011}, volume={37}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2012.E1}, DOI={10.4182/amt.2012.E1}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Lowenstein, David M. and Huseth, Anders S. and Groves, Carol L.}, year={2012}, month={Jan}, pages={E1} } @inproceedings{groves_chapman_huseth_2012, title={Evaluation of insecticides for the control of the Colorado potato beetle, potato leafhopper, and aphids in potato}, volume={25}, number={199-201}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Groves, R.L. and Chapman, S.A> and Huseth, A.S.}, year={2012} } @inproceedings{groves_chapman_huseth_2012, title={Foliar insecticide treatments for the control of potato leafhopper in Wisconsin potato production}, volume={25}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Groves, R.L. and Chapman, S.A. and Huseth, A.S.}, year={2012}, pages={195–196} } @inproceedings{groves_chapman_huseth_2012, title={Foliar insecticide treatments to limit the spread of Potato Virus Y in Wisconsin seed potato production}, volume={25}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Groves, R.L. and Chapman, S.A. and Huseth, A.S.}, year={2012}, pages={197–198} } @article{groves_chapman_lowenstein_huseth_groves_2012, title={Full Season Management of Colorado Potato Beetle and Potato Leafhopper in Potato, 2011}, volume={37}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2012.E48}, DOI={10.4182/amt.2012.E48}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Lowenstein, David M. and Huseth, Anders and Groves, Carol L.}, year={2012}, month={Jan}, pages={E48} } @article{huseth_groves_2012, title={Groundhog day for the Colorado potato beetle: when will they emerge?}, volume={64}, number={3}, journal={The Badger Common'Tater}, author={Huseth, A.S, and Groves, R.L.}, year={2012}, pages={10–12} } @inproceedings{groves_chapman_huseth_2012, title={Large plot demonstration experiments for control of Colorado potato beetle in Wisconsin potatoes}, volume={25}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Groves, R.L. and Chapman, S.A. and Huseth, A.S.}, year={2012}, pages={203–206} } @article{groves_chapman_lowenstein_huseth_groves_2012, title={Registered and Experimental Foliar Insecticides to Control Colorado Potato Beetle and Potato Leafhopper in Potato, 2011}, volume={37}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2012.E47}, DOI={10.4182/amt.2012.E47}, abstractNote={The objective of this experiment was to assess the efficacy of foliar insecticides applied to control insect pests of potato. The trial consisted of 30 main effect treatments arranged in a randomized complete block (RCB) design with four experimental replicates. Potato was machine planted on 22 April 2014 at the Hancock Agricultural Research Station in central Wisconsin. Experimental plots consisted of two-row plots measuring 6 ft (1.8 m) in width and 20 ft (6.1 m) in length with unplanted guard rows on each side. Rows were planted on 36-inch row centers (0.9 m) with 12 inches (0.3 m) between plants with 12-ft (3.6 m) alleys separating replications. All foliar treatments were applied at 20 …}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Lowenstein, David M. and Huseth, Anders S. and Groves, Carol L.}, year={2012}, month={Jan}, pages={E47} } @inproceedings{groves_chapman_huseth_2012, title={Registered and experimental foliar insecticides to control Colorado potato beetle and potato leafhopper in potato}, volume={25}, booktitle={Proceedings of Wisconsin's Annual Potato Meeting}, publisher={UW-Madison College of Agriculture and Life Sciences, Research Division and UWEX}, author={Groves, R.L. and Chapman, S.A. and Huseth, A.S.}, year={2012}, pages={191–193} } @article{lowenstein_huseth_groves_2012, title={Response of Wild Bees (Hymenoptera: Apoidea: Anthophila) to Surrounding Land Cover in Wisconsin Pickling Cucumber}, volume={41}, ISSN={0046-225X 1938-2936}, url={http://dx.doi.org/10.1603/EN11241}, DOI={10.1603/en11241}, abstractNote={ABSTRACT Cucumber (Cucumis sativus L.) is among the plants highly dependent on insectmediated pollination, but little is known about its unmanaged pollinators. Both domestic and wild bee populations in central Wisconsin pickling cucumber fields were assessed using a combination of pan trapping and floral observations before and during bloom. Together with land cover analyses extending 2,000 m from field centers, the relationship of land cover components and bee abundance and diversity were examined. Over a 2-yr sample interval distributed among 18 experimental sites, 3,185 wild bees were collected representing >60 species. A positive association was found between both noncrop and herbaceous areas with bee abundance and diversity only during bloom. Response of bee abundance and diversity to land cover was strongest at larger buffers presumably because of the heterogeneous nature of the landscape and connectivity between crop and noncrop areas. These results are consistent with previous research that has found a weak response of wild bees to surrounding vegetation in moderately fragmented areas. A diverse community of wild bees is present within the fields of a commercial cucumber system, and there is evidence of floral visitation by unmanaged bees. This evidence emphasizes the importance of wild pollinators in fragmented landscapes and the need for additional research to investigate the effectiveness of individual species in pollen deposition.}, number={3}, journal={Environmental Entomology}, publisher={Oxford University Press (OUP)}, author={Lowenstein, D. M. and Huseth, A. S. and Groves, R. L.}, year={2012}, month={Jun}, pages={532–540} } @article{groves_chapman_lowenstein_huseth_groves_2012, title={Use of Systemic Insecticides to Control Colorado Potato Beetle and Potato Leafhopper, 2011}, volume={37}, ISSN={2155-9856}, url={http://dx.doi.org/10.4182/amt.2012.E49}, DOI={10.4182/amt.2012.E49}, number={1}, journal={Arthropod Management Tests}, publisher={Oxford University Press (OUP)}, author={Groves, Russell L. and Chapman, Scott and Lowenstein, David M. and Huseth, Anders S. and Groves, Carol L.}, year={2012}, month={Jan}, pages={E49} } @inproceedings{huseth_groves_2011, title={Colorado potato beetle insecticide resistance in Wisconsin: characterizing diapause physiology and behavior associated with neonicotinoid resistance}, volume={24}, booktitle={Proceedings of the Wisconsin Potato and Vegetable Growers Association, Grower Education Conference}, author={Huseth, A.S. and Groves, R.L.}, year={2011}, pages={149–152} } @inproceedings{huseth_groves_2010, title={Overwintering biology and extended diapause in Colorado potato beetle}, volume={23}, booktitle={Proceedings of the Wisconsin Potato and Vegetable Growers Association, Grower Education Conference}, author={Huseth, A.S. and Groves, R.L.}, year={2010}, pages={89–92} } @inproceedings{huseth_groves_2009, title={Overwintering Habitats of the Colorado potato beetle in Wisconsin's Central Sands Production Area}, volume={22}, booktitle={Proceedings of the Wisconsin Potato and Vegetable Growers Association, Grower Education Conference}, author={Huseth, A.S. and Groves, R.L.}, year={2009}, pages={31–36} } @inproceedings{huseth_groves_2008, title={Overwintering Habitats of the Colorado potato beetle in Wisconsin's Central Sands Production Area}, volume={21}, booktitle={Proceedings of the Wisconsin Potato and Vegetable Growers Association, Grower Education Conference}, author={Huseth, A.S. and Groves, R.L.}, year={2008}, pages={29–32} }