@article{monfort_culbreath_abney_brandenburg_royals_jordan_herbert_taylor_malone_2021, title={Effect of thiamethoxam seed treatment in peanut}, ISSN={["2374-3832"]}, DOI={10.1002/cft2.20135}, abstractNote={AbstractTobacco thrips (Frankliniella fusca) and tomato spotted wilt (TSW) orthotospovirus (family Tospoviridae, genus Orthotospovirus) can reduce peanut (Arachis hypogaea L.) yield. Systemic insecticides are applied in the seed furrow at planting and to peanut foliage to reduce injury from tobacco thrips and decrease incidence of TSW. Research was conducted in Georgia, North Carolina, South Carolina, and Virginia in 2013 and 2014 to compare the effect of the following treatments on tobacco thrips feeding injury and expression of TSW in peanut: thiamethoxam seed treatment, thiamethoxam seed treatment followed by acephate 3 weeks after planting, phorate applied in the seed furrow at planting, and a nontreated check. Tobacco thrips feeding injury and TSW incidence were significantly higher in thiamethoxam and thiamethoxam followed by acephate‐treated peanut than peanut treated with phorate. Thiamethoxan seed treatment followed by acephate resulted in significantly lower tobacco thrips feeding injury compared to thiamethoxam seed treatment alone. Yield of Virginia market type cultivars was greater when thiamethoxam was followed by acephate applied to peanut foliage or when phorate was applied compared with nontreated peanut or the seed treatment alone. Runner market type cultivars yielded higher when phorate was applied compared with nontreated peanut while peanut treated with thiamethoxam with or with acephate yielded similar to both of these treatments.}, journal={CROP FORAGE & TURFGRASS MANAGEMENT}, author={Monfort, Scott and Culbreath, Albert and Abney, Mark and Brandenburg, Rick and Royals, Brian and Jordan, David and Herbert, Ames, Jr. and Taylor, Sally and Malone, Sean}, year={2021}, month={Nov} }
 @article{brill_sorenson_abney_2016, title={Freeze Susceptibility and Supercooling Temperature of Plectris aliena (Coleoptera: Scarabaeidae) Third Instars}, volume={51}, ISSN={["0749-8004"]}, DOI={10.18474/jes15-42.1}, abstractNote={Temperature is a density-independent abiotic mortality factor, although the response of insects to cold temperature varies between and within species (Bale 1989, Agric. Zool. Rev. 3: 157–192). The abundance of the overwintering stage of an insect depends in part on its cold hardiness, or ability to survive lowtemperature exposure aboveground or in subterranean habitats (Bale 1989). Freeze-tolerant insects can survive the freezing of tissues at temperatures below 08C, while freezesusceptible insects perish when their tissues freeze (Chapman 1998, Pp. 509–528, In The Insects: Structure and Function, 4th ed., Cambridge Univ. Press, New York). Insects that are freeze susceptible avoid freeze mortality by supercooling, or maintaining liquid water below the freezing point (Chapman 1998). For many freeze-susceptible insects native to tropical or temperate regions, the supercooling point (the sub-08C temperature at which the tissue water spontaneously freezes) is very low, often below 208C, but this can be influenced (increased or decreased) by life stage, acclimatization, feeding, water content, and cuticular surface moisture (Bale 1989, Chapman 1998). Freezing of freeze-susceptible insects can be induced at a temperature above the supercooling point through ice inoculation by internal or external factors, such as food in the gut or surface contact with an ice-nucleating agent (Bale 1989). Plectris aliena Chapman (Coleoptera: Scarabaeidae) is native to South America and, although it has been in the United States since the early 1900s (Chapin 1934, Proc. Biol. Soc. Wash. 47: 33–36), the insect only became a severe problem for sweetpotato growers in Columbus Co. in southeastern North Carolina beginning in 2006. Sweetpotato Ipomoea batatas (L.) Lamarck roots are rendered unmarketable}, number={3}, journal={JOURNAL OF ENTOMOLOGICAL SCIENCE}, author={Brill, Nancy L. and Sorenson, Clyde E. and Abney, Mark R.}, year={2016}, month={Jul}, pages={252–255} }
 @article{herlihy_van driesche_abney_brodeur_bryant_casagrande_delaney_elkner_fleischer_groves_et al._2012, title={Distribution of cotesia rubecula (Hymenoptera: Braconidae) and its displacement of Cotesia glomerata in Eastern North America}, volume={95}, number={2}, journal={Florida Entomologist}, author={Herlihy, M. V. and Van Driesche, R. G. and Abney, M. R. and Brodeur, J. and Bryant, A. B. and Casagrande, R. A. and Delaney, D. A. and Elkner, T. E. and Fleischer, S. J. and Groves, R. L. and et al.}, year={2012}, pages={461–467} }
 @article{abney_kennedy_2011, title={Relative Susceptibility of Two Sweetpotato Varieties to Storage Root Damage by Sweetpotato Flea Beetle (Coleoptera: Chrysomelidae) and Wireworm (Coleoptera: Elateridae)}, volume={104}, ISSN={["1938-291X"]}, DOI={10.1603/ec10196}, abstractNote={ABSTRACT The feeding of soil dwelling insects on storage roots is one of the most serious management issues faced by sweetpotato, Ipomoea batatas (L.) Lam. (Convolvulaceae), growers in the southern United States. Field studies were conducted to evaluate the relative susceptibility of two commonly grown sweetpotato varieties to sweetpotato flea beetle, Chaetocnema confinis Crotch (Coleoptera: Chrysomelidae), and wireworms (Coleoptera: Elateridae, various species). The incidence and severity of sweetpotato flea beetle damage was significantly lower in the variety Covington than Beauregard in two small plot replicated studies. Surveys conducted in commercial sweetpotato fields also showed significantly less sweetpotato flea beetle damage in fields planted to Covington compared with those planted to Beauregard. There was no clear evidence of varietal effect on the incidence of wireworm damage in the study. Results indicate that the severity of wireworm damage as measured by the size of feeding scars may be less in Covington than Beauregard.}, number={1}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Abney, Mark R. and Kennedy, George G.}, year={2011}, month={Feb}, pages={143–148} }
 @article{willis_abney_holmes_schultheis_kennedy_2010, title={Influence of Preceding Crop on Wireworm (Coleoptera: Elateridae) Abundance in the Coastal Plain of North Carolina}, volume={103}, ISSN={["1938-291X"]}, DOI={10.1603/ec10184}, abstractNote={ABSTRACT Three studies were conducted to determine the effect of preceding crop on wireworm (Coleoptera: Elateridae) abundance in the coastal plain of North Carolina. In all three studies, samples of wireworm populations were taken from the soil by using oat, Avena sativa L., baits. Treatments were defined by the previous year's crop and were chosen to reflect common crop rotations in the region. Across all three studies, eight wireworm species were recovered from the baits: Conoderus amplicollis (Gyllenhal), Conoderus bellus (Say), Conoderus falli (Lane), Conoderus lividus (Degeer), Conoderus scissus (Schaeffer), Conoderus vespertinus (F.), Glyphonyx bimarginatus (Schaeffer), and Melanotus communis (Gyllenhal). The effect of corn, Zea mays L.; cotton, Gossypium hirsutum L.; fallow; soybean, Glycine max (L.) Merr.; sweet potato, Ipomoea batatas (L.) Lam.; and tobacco (Nicotiana spp.) was evaluated in a small-plot replicated study. M. communis was the most frequently collected species in the small-plot study and was found in significantly higher numbers following soybean and corn. The mean total number of wireworms per bait (all species) was highest following soybean. A second study conducted in late fall and early spring assessed the abundance of overwintering wireworm populations in commercial fields planted to corn, cotton, peanut (Arachis hypogaea L.), soybean, sweet potato, and tobacco in the most recent previous growing season. C. lividus was the most abundant species, and the mean total number of wireworms was highest following corn and soybean. A survey was conducted in commercial sweet potato in late spring and early summer in fields that had been planted to corn, cotton, cucurbit (Cucurbita pepo L.), peanut, soybean, sweet potato, or tobacco in the most recent previous growing season. C. vespertinus was the most abundant species, and the mean total number of wireworms per bait was highest following corn.}, number={6}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Willis, Rebecca B. and Abney, Mark R. and Holmes, Gerald J. and Schultheis, Jonathan R. and Kennedy, George G.}, year={2010}, month={Dec}, pages={2087–2093} }
 @article{willis_abney_kennedy_2010, title={Survey of Wireworms (Coleoptera: Elateridae) in North Carolina Sweetpotato Fields and Seasonal Abundance of Conoderus vespertinus}, volume={103}, ISSN={["1938-291X"]}, DOI={10.1603/ec09174}, abstractNote={ABSTRACT Adult and larval wireworm (Coleoptera: Elateridae) populations were surveyed in North Carolina sweetpotato, Ipomoea batatas (L.) Lam., fields during 2005 and 2006 by using yellow sticky traps and larval baits. Eight species of larvae and nine species of adult wireworms were identified. Conoderus vespertinus (F.) was the most prevalent wireworm species, making up 65.9% of the larvae and 62.9% of the adults captured. Adult C. vespertinus were most abundant in July, and larvae were smaller and more abundant after 15 July than earlier in the season, indicating an early summer generation turnover and oviposition in fields planted to sweetpotato. A significant positive relationship was observed between late-season abundance of C. vespertinus and the incidence of wireworm damage. Other wireworm species encountered were Conoderus amplicollis (Gyllenhal), Conoderus bellus (Say), Conoderus falli (Lane), Conoderus lividus (Degeer), Conoderus scissus (Schaeffer), Glyphonyx bimarginatus (Schaeffer), and Melanotus communis (Gyllenhal).}, number={4}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Willis, Rebecca Baumler and Abney, Mark R. and Kennedy, George G.}, year={2010}, month={Aug}, pages={1268–1276} }
 @article{jasrotia_abney_neerdaels_kennedy_2008, title={Influence of soil temperature, rainfall, and planting and harvest dates on Chaetocnema confinis (Coleoptera : Chrysomelidae) damage to sweetpotato roots}, volume={101}, ISSN={["1938-291X"]}, DOI={10.1603/0022-0493(2008)101[1238:IOSTRA]2.0.CO;2}, abstractNote={Abstract A study was carried out in 10 counties of North Carolina from 2004 to 2006 to determine the effect of planting and harvest times on flea beetle, Chaetocnema confinis Crotch (Coleoptera: Chrysomelidae), damage to sweetpotato, Ipomoea batatas (L.), storage roots. Planting and harvesting of sweetpotatoes later in the season resulted in less damage than early planting and harvesting. Regression analysis was done to study the relationship of weather parameters with the flea beetle damage. Weather parameters included air temperature (Celsius), soil temperature at 5- and 10-cm depth (Celsius), rainfall (millimeters), and soil moisture (volume:volume) at 0–10-, 10–40-, and 40–100-cm depth. The best regression model included mean soil temperature at 10-cm depth, total rainfall, and number of adults caught on yellow sticky traps as independent variables (all between 1 August and harvest date of each field). Soil temperature and adult catches on yellow sticky traps of C. confinis were positively related to damage, whereas rainfall was negatively correlated. The model explained 45% of the total variation in the flea beetle damage. Soil temperature alone accounted for 32% of the total variation in flea beetle damage followed by rainfall (9%) and adult catches (4%). When the time interval was limited to 30 d before harvest, soil temperature was still the best explanatory variable accounting for 23% of the total variation in flea beetle damage followed by rainfall (7%) and adult catches (4%). Understanding the effects of planting/harvesting and weather factors on flea beetle damage will be useful in predicting the time when the sweetpotato crop is at greater risk from high levels of damage by C. confinis.}, number={4}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Jasrotia, Poonam and Abney, Mark R. and Neerdaels, Natalia B. and Kennedy, George G.}, year={2008}, month={Aug}, pages={1238–1243} }
 @article{abney_ruberson_herzog_kring_steinkraus_roberts_2008, title={Rise and fall of cotton aphid (Hemiptera : Aphididae) populations in southeastern cotton production systems}, volume={101}, ISSN={["1938-291X"]}, DOI={10.1603/0022-0493(2008)101[23:RAFOCA]2.0.CO;2}, abstractNote={Abstract The impact of natural enemies on cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), populations in cotton, Gossypium hirsutum L., production systems in the southeastern United States was evaluated over 3 yr in irrigated commercial cotton fields. Fungal epizootics caused by the entomopathogen Neozygites fresenii (Nowakowski) Batko reduced aphid numbers to subthreshold levels in 1999, 2000, and 2001 and occurred consistently in early to mid-July in all 3 yr. Scymnus spp. were the most abundant aphidophagous predators, although other coccinellid species and generalist predators such as spiders, fire ants, heteropterans, and neuropterans also were present. Studies using arthropod exclusion cages demonstrated little impact of predators or parasitoids on aphid populations before fungal epizootics. Arthropod natural enemies were most abundant after epizootics and may have suppressed aphid populations late in the season. Seed cotton yield, and lint quality were not affected by aphicide applications in any year of the study. Implications of these findings for aphid management in the southeastern United States are discussed.}, number={1}, journal={JOURNAL OF ECONOMIC ENTOMOLOGY}, author={Abney, Mark R. and Ruberson, John R. and Herzog, Gary A. and Kring, Timothy J. and Steinkraus, Donald C. and Roberts, Phillip M.}, year={2008}, month={Feb}, pages={23–35} }
 @article{abney_sorenson_gould_bradley_2008, title={Limitations of stable carbon isotope analysis for determining natal host origins of tobacco budworm, Heliothis virescens}, volume={126}, ISSN={["1570-7458"]}, DOI={10.1111/j.1570-7458.2007.00633.x}, abstractNote={AbstractDifferences in the stable carbon isotope ratios of plants utilizing the C3 vs. C4 photosynthetic pathway have been used to broadly identify the natal host origins of herbivorous insects. This study explored whether adequate variation exists between the carbon isotope ratios of different C3 plants in the host range of Heliothis virescens (Fabricius) (Lepidoptera: Noctuidae) to enable accurate identification of natal host‐plant species. Isotope ratio mass spectrometry (IRMS) analysis of 13C/12C ratios of moths reared on four crop plant species [Gossypium hirsutum (L.), Nicotiana tabacum L., Glycine max (L.) Merrill, and Arachis hypogaea L.] and two common weed species [Geranium carolinianum L. and Linaria canadensis (L.) Chaz.] revealed a range of δ13C values within that expected for plants utilizing the C3 photosynthetic pathway. Analysis of vegetative and reproductive tissues from the plants utilized in the study resulted in statistically different δ13C values for some plant species; nevertheless, the range of δ13C values observed for many plant species overlapped. Significant differences in mean δ13C values were detected between groups of moths reared on different host‐plant species, but there was no significant correlation between the δ13C values of moths vs. the δ13C value of plant tissue on which they were reared. Feral tobacco budworm moths collected over 3 years were found to have carbon isotope ratios consistent with those having fed on C3 plants, confirming little utilization of C4 plant species by the insect. Results demonstrate that within the range of C3 host plants tested, carbon isotope signatures are not sufficiently unique to enable a reliable determination of natal origin of feral tobacco budworm with current IRMS technology.}, number={1}, journal={ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA}, author={Abney, M. R. and Sorenson, C. E. and Gould, F. and Bradley, J. R., Jr.}, year={2008}, month={Jan}, pages={46–52} }
 @article{abney_sorenson_southern_2007, title={Pyrethroid insecticide efficacy against tobacco budworm (Lepidoptera : Noctuidae) in North Carolina flue-cured tobacco: Implications for insecticide resistance management}, volume={42}, ISSN={["0749-8004"]}, DOI={10.18474/0749-8004-42.4.582}, abstractNote={Foliar applications of 3 pyrethroid insecticides were made to flue-cured tobacco and compared with Bacillus thuringiensis Berliner (Bt) bait and sprays of acephate and spinosad for control of the tobacco budworm, Heliothis virescens (F.), in 2001, 2002, and 2003. Lambda-cyhalothrin, cyfluthrin, and bifenthrin provided significant control of tobacco budworm when compared with untreated checks in all 3 yrs; however, they were generally less efficacious than the other insecticides tested. The level of control among the pyrethroids differed significantly within years but was inconsistent from year to year. The severity of tobacco budworm feeding damage was recorded for individual plants in each treatment, and damage averaged over pyrethroid treatments was 54.17% lower than the untreated control in 2001 and 79.84% lower in 2003. Pyrethroid treatments had no impact on yield of cured leaf in 2001 or 2003 compared with controls. The use of pyrethroid insecticides in flue-cured tobacco will increase the selection pressure placed on tobacco budworm populations in North Carolina. As a result, resistance to this class of insecticides may develop at an accelerated rate.}, number={4}, journal={JOURNAL OF ENTOMOLOGICAL SCIENCE}, author={Abney, M. R. and Sorenson, C. E. and Southern, P. S.}, year={2007}, month={Oct}, pages={582–588} }