@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={Abstract}, 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{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} } @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={Abstract}, 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} } @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{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}, 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={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={Abstract}, 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{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={Abstract}, 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} } @article{leckie_d'ambrosio_chappell_halitschke_de jong_kessler_kennedy_mutschler_2016, title={Differential and Synergistic Functionality of Acylsugars in Suppressing Oviposition by Insect Herbivores}, volume={11}, ISSN={1932-6203}, url={http://dx.doi.org/10.1371/journal.pone.0153345}, DOI={10.1371/journal.pone.0153345}, abstractNote={Acylsugars are secondary metabolites exuded from type IV glandular trichomes that provide broad-spectrum insect suppression for Solanum pennellii Correll, a wild relative of cultivated tomato. Acylsugars produced by different S. pennellii accessions vary by sugar moieties (glucose or sucrose) and fatty acid side chains (lengths and branching patterns). Our objective was to determine which acylsugar compositions more effectively suppressed oviposition of the whitefly Bemisia tabaci (Gennadius) (Middle East—Asia Minor 1 Group), tobacco thrips, Frankliniella fusca (Hinds), and western flower thrips, Frankliniella occidentalis (Pergande). We extracted and characterized acylsugars from four S. pennellii accessions with different compositions, as well as from an acylsugar-producing tomato breeding line. We also fractionated the acylsugars of one S. pennellii accession to examine the effects of its components. Effects of acylsugars on oviposition were evaluated by administering a range of doses to oviposition sites of adult whiteflies and thrips in non-choice and choice bioassays, respectively. The acylsugars from S. pennellii accessions and the tomato breeding line demonstrated differential functionality in their ability to alter the distribution of whitefly oviposition and suppress oviposition on acylsugar treated substrates. Tobacco thrips were sensitive to all compositions while western flower thrips and whiteflies were more sensitive to acylsugars from a subset of S. pennellii accessions. It follows that acylsugars could thus mediate plant-enemy interactions in such a way as to affect evolution of host specialization, resistance specificity, and potentially host differentiation or local adaptation. The acylsugars from S. pennellii LA1376 were separated by polarity into two fractions that differed sharply for their sugar moieties and fatty acid side chains. These fractions had different efficacies, with neither having activity approaching that of the original exudate. When these two fractions were recombined, the effect on both whiteflies and thrips exceeded the sum of the two fractions’ effects, and was similar to that of the original exudate. These results suggest that increasing diversity of components within a mixture may increase suppression through synergistic interactions. This study demonstrates the potential for composition-specific deployment of acylsugars for herbivore oviposition suppression, either through in planta production by tomato lines, or as biocides applied by a foliar spray.}, number={4}, journal={PLOS ONE}, publisher={Public Library of Science (PLoS)}, author={Leckie, Brian M. and D'Ambrosio, Damon A. and Chappell, Thomas M. and Halitschke, Rayko and De Jong, Darlene M. and Kessler, André and Kennedy, George G. and Mutschler, Martha A.}, editor={Wang, Xiao-WeiEditor}, year={2016}, month={Apr}, pages={e0153345} }