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 Temperate Tree Fruit and Vegetable Research: Wapato, WA
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David R Horton    Research Entomologist **Research Interests:** Biological control; biology and ecology of pear psylla; biology of potato psyllid and wireworm in potatoes; biology and ecology of predaceous Heteroptera; insect pest management in potatoes and tree fruit **Research Background:** David R. Horton is a GS-15 Research Entomologist with responsibilities for developing new methods for controlling insect pests in potatoes and tree fruit. His research emphasizes use of integrated pest management, biological control, cultural control, and lesser toxic chemicals to manage pests. Ongoing studies in potatoes focus on developing tools for growers to use in monitoring or managing potato psyllids, leafhoppers, and wireworms. Dr. Horton has published over 100 papers in peer-reviewed journals, including several book chapters and invited reviews. **Laboratory Personnel:** Tamera Lewis, Biological Science Technician ProjectsNew Technologies and Strategies for Managing Emerging Insect Pests and Insect Transmitted Pathogens of PotatoesIn-House Appropriated (D)Accession Number:439448Integrated Approach to Manage the Pest Complex on Temperate Tree FruitsIn-House Appropriated (D)Accession Number:439454Biological Control of Insect PestsNon-Assistance Cooperative Agreement (S)Accession Number:443633The Whirligig Mite and New Biological Control Opportunities in PotatoesNon-Assistance Cooperative Agreement (S)Accession Number:444357Identification of New ‘Ca. L. solanacearum’ Plant Pathogens and Their Psyllid Vectors and Plant Hosts in Oregon State.Non-Assistance Cooperative Agreement (S)Accession Number:444947Identification of New ‘Ca. L. solanacearum’ Plant Pathogens and Their Psyllid Vectors and Plant Hosts in Washington State.Non-Assistance Cooperative Agreement (S)Accession Number:444950Areawide Management of Insect Vectors in Columbia Basin Vegetable and Seed CropsNon-Assistance Cooperative Agreement (S)Accession Number:436896Identifying Important Parasites and Predators of Potato Psyllid in Non-Crop Habitats of the Columbia BasinNon-Assistance Cooperative Agreement (S)Accession Number:438303
 ARS News ArticlesitemNew Agreement Takes Aim at Potato Pest and its Disease-Causing CohortitemPear Pest's Chemical "Come Hither" Identified
 Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Psyllids in natural habitats as alternative resources for key natural enemies of the pear psyllids (Hemiptera: Psylloidea)-(Peer Reviewed Journal) Horton, D.R. 2024. Psyllids in natural habitats as alternative resources for key natural enemies of the pear psyllids (Hemiptera: Psylloidea). Insects. https://doi.org/10.3390/insects15010037.Seasonal activity of Trechnites insidiosus(Hymenoptera: Encyrtidae) and its host Cacopsylla pyricola (Hemiptera: Psyllidae) in pear-(Peer Reviewed Journal) Zilnik, G.L., Cooper, W.R., Horton, D.R., Orpet, R., Nottingham, L., Hilton, R., Adams, C., Dickens, K., Halbert, S., Snyder, J., Schmidt-Jeffris, R.A. 2023. Seasonal activity of Trechnites insidiosus(Hymenoptera: Encyrtidae) and its host Cacopsylla pyricola (Hemiptera: Psyllidae) in pear. Journal of Economic Entomology. 116:1957-1968. https://doi.org/10.1093/jee/toad199.Characterizing substrate-borne vibrational mating signals produced by pear psylla, Cacopsylla pyricola (Hemiptera: Psyllidae)-(Peer Reviewed Journal) Jocson, D.M., Gonzales, M.T., Horton, D.R., Beers, E., Oeller, L.C., Crowder, D.C. 2023. Characterizing substrate-borne vibrational mating signals produced by pear psylla, Cacopsylla pyricola (Hemiptera: Psyllidae). Journal of Insect Behavior. https://doi.org/10.1007/s10905-023-09839-2.Diversity, biology, and management of the pear psyllids: a global look-(Peer Reviewed Journal) Civolani, S., Soroker, V., Cooper, W.R., Horton, D.R. 2023. Diversity, biology, and management of the pear psyllids: a global look. Annals of the Entomological Society of America. https://doi.org/10.1093/aesa/saad025.Targeted RT-PCR based gut content analysis for potato psyllid predation in laboratory assays-(Peer Reviewed Journal) Ohler, B.J., Reyes Corral, C.A., Cooper, W.R., Horton, D.R., Waters, T.D. 2023. Targeted RT-PCR based gut content analysis for potato psyllid predation in laboratory assays. American Journal of Potato Research. https://doi.org/10.1007/s12230-023-09920-8.Association of two Bactericera species (Hemiptera: Triozidae) with native Lycium spp. (Solanales: Solanaceae) in the potato growing regions of the Rio Grande Valley of Texas-(Peer Reviewed Journal) Cooper, W.R., Esparza-Diaz, G., Wildung, M.R., Horton, D.R., Badillo-Vargas, I.E., Halbert, S.E. 2022. Association of two Bactericera species (Hemiptera: Triozidae) with native Lycium spp. (Solanales: Solanaceae) in the potato growing regions of the Rio Grande Valley of Texas. Environmental Entomology. 52(1):98-107. https://doi.org/10.1093/ee/nvac109.Identification of three new ‘Candidatus Liberibacter solanacearum’ haplotypes in four psyllid species (Hemiptera: Psylloidea)-(Peer Reviewed Journal) Swisher Grimm, K.D., Horton, D.R., Lewis, T.M., Garczynski, S., Jensen, A., Charlton, B. 2022. Identification of three new ‘Candidatus Liberibacter solanacearum’ haplotypes in four psyllid species (Hemiptera: Psylloidea). Scientific Reports. 12. Article 20618. https://doi.org/10.1038/s41598-022-24032-9.Good to know: integrated research.  Entomologists at the USDA laboratory in Wapato, Washington, work to advance IPM for orchards-(Trade Journal) Cooper, W.R., Horton, D.R., Neven, L.G., Serrano, J.M., Walker Iii, W.B., Yee, W.L., Schmidt-Jeffris, R.A. 2022. Good to know: integrated research.  Entomologists at the USDA laboratory in Wapato, Washington, work to advance IPM for orchards. Good Fruit Grower. March 1, 2022 Issue.Factors influencing Trechnites spp. abundance in WA and OR pear orchards-(Abstract Only)Bacterial endosymbionts of Bactericera maculipennis and three mitochondrial haplotypes of B. cockerelli (Hemiptera: Psylloidea: Triozidae)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R., Swisher Grimm, K.D., Krey, K., Wildung, M.R. 2021. Bacterial endosymbionts of Bactericera maculipennis and three mitochondrial haplotypes of B. cockerelli (Hemiptera: Psylloidea: Triozidae). Environmental Entomology. 51(1):94-107. https://doi.org/10.1093/ee/nvab133.Crude extracts and alkaloids derived from Ipomoea-Periglandula symbiotic association cause mortality of Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae)-(Peer Reviewed Journal) Chen, X., Kaur, N., Horton, D.R., Cooper, W.R., Qureshi, J.A., Stelinski, L.L. 2021. Crude extracts and alkaloids derived from Ipomoea-Periglandula symbiotic association cause mortality of Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Psyllidae). Insects. 12(10). Article 929. https://doi.org/10.3390/insects12100929.Association of Bactericera cockerelli (Hemiptera: Triozidae) with the perennial weed Physalis longifolia (Solanales: Solanaceae) in the potato-growing regions of western Idaho-(Peer Reviewed Journal) Reyes Corral, C., Cooper, W.R., Horton, D.R., Miliczky, E., Riebe, J., Waters, T., Wildung, M., Karasev, A. 2021. Association of Bactericera cockerelli (Hemiptera: Triozidae) with the perennial weed Physalis longifolia (Solanales: Solanaceae) in the potato-growing regions of western Idaho. Environmental Entomology. 50(6):1416-1424. https://doi.org/10.1093/ee/nvab076.Matrimony Vine: Friend or Foe in the Battle Against Potato Psyllid-(Popular Publication) Cooper, W.R., Horton, D.R., Wohleb, C.H., Jensen, A.S. 2021. Matrimony Vine: Friend or Foe in the Battle Against Potato Psyllid. Potato Progress. 21;3.Exotic psyllids and exotic hosts: accumulation of non-native Psylloidea in North America (Hemiptera)-(Peer Reviewed Journal) Horton, D.R., Miliczky, G., Waters, T., Burckhardt, D., Halbert, S. 2021. Exotic psyllids and exotic hosts: accumulation of non-native Psylloidea in North America (Hemiptera). Annals of the Entomological Society of America. 114(4):425-447. https://doi.org/10.1093/aesa/saab014.Stylet probing behavior of two Bactericera (Hemiptera:Psylloidea:Triozidae) species on host and nonhost plants-(Peer Reviewed Journal) Mustafa, T., Horton, D.R., Cooper, W.R., Zack, R., Thinakaran, J., Karasev, A., Munyaneza, J.E. 2021. Stylet-probing behavior of two Bactericera species on host and non-host plants (Hemiptera: Psylloidea: Triozidae). Environmental Entomology. 50(4):919-928. https://doi.org/10.1093/ee/nvab031.Susceptibility of Physalis longifolia (Solanales: Solanaceae) to Bactericera cockerelli (Hemiptera: Triozidae) and “Candidatus Liberibacter solanacearum"-(Peer Reviewed Journal) Reyes Corral, C., Cooper, W.R., Horton, D.R., Karasev, A.V. 2020. Susceptibility of Physalis longifolia (Solanales: Solanaceae) to Bactericera cockerelli (Hemiptera: Triozidae) and “Candidatus Liberibacter solanacearum". Journal of Economic Entomology. 113(6): 2595-2603. https://doi.org/10.1093/jee/toaa210.Host plant and Wolbachia shape the population genetics of sympatric herbivore populations-(Peer Reviewed Journal) Fu, Z., Meier, A.R., Epstein, B., Bergland, A.O., Castillo Carrillo, C.I., Cooper, W.R., Cruzado, R.K., Horton, D.R., Jensen, A.S., Kelley, J.L., Rashed, A., Reitz, S.R., Rondon, S.I., Thinakaran, J., Wenninger, E.J., Wohleb, C.H., Crowder, D.W., Snyder, W.E. 2020. Host plant and Wolbachia shape the population genetics of sympatric herbivore populations  . Evolutionary Applications. 13:2740-2753.Mortality of potato psyllid (Hemiptera: Triozidae) on host clippings inoculated with ergot alkaloids-(Peer Reviewed Journal) Kaur, N., Cooper, W.R., Duringer, J., Rashed, A., Badillo-Vargas, I., Esparza-Diaz, Horton, D.R. 2020. Mortality of potato psyllid (Hemiptera: Triozidae) on host clippings inoculated with ergot alkaloids. Journal of Economic Entomology. 113(5):2079-2085. https://doi.org/10.1093/jee/toaa144.The artificial sweetener, erythritol, has insecticidal properties against pear psylla (Hemiptera: Psyllidae)-(Peer Reviewed Journal) Wentz, K.M., Cooper, W.R., Horton, D.R., Kao, R., Nottingham, L.B. 2020. The artificial sweetener, erythritol, has insecticidal properties against pear psylla (Hemiptera: Psyllidae). Journal of Economic Entomology. 113(5):2293-2299. https://doi.org/10.1093/jee/toaa124.Observations on the life history and ecology of Clubiona pacifica Banks in Washington State (Araneae Clubionidae)-(Peer Reviewed Journal) Miliczky, E., Horton, D.R., Waters, T., Wohleb, C. 2020. Observations on the life history and ecology of Clubiona pacifica Banks in Washington State (Araneae Clubionidae). Journal of Arachnology. 48(1):49-50. https://doi.org/10.1636/0161-8202-48.1.49.Dispersal of Bactericera cockerelli (Hemiptera: Triozidae) in relation to phenology of Lycium barbarum (Solanaceae)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R., Thinakaran, J., Karasev, A.V. 2020.  Dispersal of Bactericera cockerelli (Hemiptera: Triozidae) in relation to phenology of Lycium barbarum (Solanaceae). Journal of British Columbia Entomological Society. 116:25-39.Identification of new ‘Candidatus Liberibacter solanacearum’ haplotypes in Solanum tuberosum and psyllid family Aphalaridae in Klamath Basin, Oregon-(Abstract Only) Swisher Grimm, K.D., Garczynski, S.F., Horton, D.R., Charlton, B.A. 2019. Identification of new ‘Candidatus Liberibacter solanacearum’ haplotypes in Solanum tuberosum and psyllid family Aphalaridae in Klamath Basin, Oregon. Phytopathology. 109:S.119-120.Prototype 3D-printed traps capture Bactericera cockerelli (Šulc) (Hemiptera: Triozidae) directly into preservative for improved detection of "Candidatus Liberibacter solanacearum"-(Peer Reviewed Journal) Wentz, K., Cooper, W.R., Horton, D.R., Wohleb, C., Waters, T., Halbert, S., Ramadugu, C., Snyder, J., Kao, R. 2020. Prototype 3D-printed traps capture Bactericera cockerelli (Šulc) (Hemiptera: Triozidae) directly into preservative for improved detection of "Candidatus Liberibacter solanacearum". Journal of Entomological Science. 55(2):147-155. https://doi.org/10.18474/0749-8004-55.2.147.Host and non-host whistle stops by psyllids: Molecular gut content analysis by high-throughput sequencing reveals landscape-level movements by Psylloidea (Hemiptera)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R., Wildung, M., Jensen, A., Thinakaran, J., Rendon, D., Nottingham, L., Beers, E., Wohleb, C., Hall, D.G., Stelinski, L. 2019. Host and non-host whistle stops by psyllids: Molecular gut content analysis by high-throughput sequencing reveals landscape-level movements by Psylloidea (Hemiptera). Environmental Entomology. 48(3):554-566. https://doi.org/10.1093/ee/nvz038.The weed link in zebra chip epidemiology-(Trade Journal) Cooper, W.R., Horton, D.R., Wohleb, C.H., Waters, T.D. 2019. The weed link in zebra chip epidemiology. Potato Progress. 19:4.The weed link in zebra chip epidemiology: Suitability of non-crop Solanaceae and Convolvulaceae to potato psyllid and Liberibacter solanacearum-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R., Miliczky, E., Wohleb, C., Waters, T. 2019. The weed link in zebra chip epidemiology: Suitability of non-crop Solanaceae and Convolvulaceae to potato psyllid and Liberibacter solanacearum. American Journal of Potato Research. 96:262:271. https://doi.org/10.1007/s12230-019-09712-z.Whence and whither the Convolvulus psyllid? An invasive plant leads to dietary expansion and range expansion by a native insect herbivore (Hemiptera: Triozidae)-(Peer Reviewed Journal) Horton, D.R., Kaur, N., Cooper, W.R., Miliczky, E., Badillo Vargas, I., Esparza-Diaz, G., Rashed, A., Waters, T., Wohleb, C., Johnson, D., Kawchuk, L., Jensen, A. 2019. Whence and whither the Convolvulus psyllid? An invasive plant leads to dietary expansion and range expansion by a native insect herbivore (Hemiptera: Triozidae). Annals of the Entomological Society of America. 112(3):249-264. https://doi.org/10.1093/aesa/say063.The beet leafhopper odyssey in North America: a brief overview-(Trade Journal) Horton, D.R., Cooper, W.R., Swisher Grimm, K.D., Crowder, D., Fu, Z., Waters, T., Wohleb, C., Frost, K., Jensen, A., Blua, M. 2018. The beet leafhopper odyssey in North America: a brief overview. Potato Progress. 18(16).Weedy sanctuaries and non-host whistle stops for potato psyllid-(Trade Journal) Cooper, W.R., Horton, D.R. 2019. Weedy sanctuaries and non-host whistle stops for potato psyllid. Potato Country USA. 35(1):36-38.Survival and development of potato psyllid (Hemiptera: Triozidae) on Convolvulaceae: effects of a plant-fungus symbiosis (Periglandula)-(Peer Reviewed Journal) Kaur, N., Horton, D.R., Cooper, W.R., Badillo-Vargas, I.E., Esparza-Diaz, G., Rashed, A., Duringer, J. 2018. Survival and development of potato psyllid (Hemiptera: Triozidae) on Convolvulaceae: effects of a plant-fungus symbiosis (Periglandula). PLoS One. 13(9):e0201506. https://doi.org/10.1371/journal.pone.0201506.Building a better Psylloidea (Hemiptera) trap?  A field-look at a prototype trap constructed using three-dimensional printer technology-(Peer Reviewed Journal) Horton, D.R., Miliczky, E., Lewis, T.M., Wohleb, C., Dickens, A., Halbert, S., Ramadugu, C., Jensen, A. 2018. Building a better Psylloidea (Hemiptera) trap?  A field-look at a prototype trap constructed using three-dimensional printer technology. The Canadian Entomologist. 151(1):115-129. https://doi.org/10.4039/tce.2018.59.Mapping potato psyllid populations in potato in the Columbia Basin of Washington and Oregon from 2013 – 2017-(Abstract Only) Swisher Grimm, K.D., Cueva, I., Wohleb, C., Horton, D.R., Cooper, W.R., Munyaneza, J.E. 2019. Mapping potato psyllid populations in potato in the Columbia Basin of Washington and Oregon from 2013 – 2017. American Journal of Potato Research. 96:327. https://doi.org/10.1007/s12230-019-09723-w.The “morning glory” psyllid?  Potato psyllid development on morning glories and bindweed-(Trade Journal) Kaur, N., Rashed, A., Horton, D.R., Cooper, W.R., Badillo-Vargas, I., Esparza-Diaz, G., Jensen, A., Johnson, D., Kawchuk, L. 2018. The “morning glory” psyllid?  Potato psyllid development on morning glories and bindweed. Potato Progress. 18(11).The weed link in zebra chip epidemiology: Annual and perennial weeds as sources of the zebra chip pathogen-(Proceedings) Cooper, W.R., Horton, D.R., Thinakaran, J. 2018. The weed link in zebra chip epidemiology: Annual and perennial weeds as sources of the zebra chip pathogen. American Journal of Potato Research. 95:212.Pinpointing the weed sources of potato psyllid in Washington-(Proceedings)Use of Lycium by potato psyllid in the Pacific Northwest lessons from the desert Southwest-(Proceedings) Thinakaran, J., Horton, D.R., Cooper, W.R., Karasev, A. 2018. Use of Lycium by potato psyllid in the Pacific Northwest lessons from the desert Southwest. American Journal of Potato Research. 95:226.The latest buzz on bugs-(Trade Journal) Cooper, W.R., Garczynski, S.F., Horton, D.R., Knight, A.L., Neven, L.G., Yee, W.L. 2018. The latest buzz on bugs. Good Fruit Grower. 69(5):38-40.Candidatus Phytoplasma pyri affects behavior of Cacopsylla pyricola (Hemiptera: Psyllidae)-(Peer Reviewed Journal) Cruz, M., Cooper, W.R., Horton, D.R., Barcenas, N. 2018. Candidatus Phytoplasma pyri affects behavior of Cacopsylla pyricola (Hemiptera: Psyllidae). Journal of Entomological Science. 53(3):361-371. https://doi.org/10.18474/JES17-115.1.Potato psyllid and the South American desert plant Nolana: an unlikely psyllid host?-(Trade Journal) Horton, D.R., Miliczky, E., Thinakaran, J., Cooper, W.R., Munyaneza, J., Wohleb, C., Karasev, A. 2017. Potato psyllid and the South American desert plant Nolana: an unlikely psyllid host?. Potato Progress. 17:16.New North American records for the Old World psyllid Heterotrioza chenopodii (Reuter) with biological observations (Hemiptera: Psylloidea: Triozidae)-(Peer Reviewed Journal) Horton, D.R., Miliczky, E., Lewis, T.M., Cooper, W.R., Waters, T., Wohleb, C., Zack, R., Johnson, D., Jensen, A. 2018. New North American records for the Old World psyllid Heterotrioza chenopodii (Reuter) with biological observations (Hemiptera: Psylloidea: Triozidae). Proceedings of the Entomological Society of Washington. 120(1):134-152.Pinpointing the weed source of potato psyllids arriving in Pacific Northwest potatoes-(Trade Journal) Thinakaran, J., Horton, D.R., Cooper, W.R., Karasev, A. 2017. Pinpointing the weed source of potato psyllids arriving in Pacific Northwest potatoes. Potato Grower. December 2017:44-45.Potato-related research at USDA-ARS laboratories in Washington and Idaho-(Trade Journal) Horton, D.R., Cooper, W.R., Landolt, P.J., Thinakaran, J., Miliczky, E., Kaur, N., Navarre, D.A., Brown, C.R., Swisher, K.D., Novy, R.G., Whitworth, J.L. 2017. Potato-related research at USDA-ARS laboratories in Washington and Idaho. Potato Progress. 17(14):1-12.Association of potato psyllid (Bactericera cockerelli; Hemiptera: Triozidae) with Lycium spp. (Solanaceae) in potato growing regions of Washington, Idaho, and Oregon-(Peer Reviewed Journal) Thinakaran, J., Horton, D.R., Cooper, W.R., Jensen, A., Wohleb, C., Dahan, J., Mustafa, T., Karasev, A., Munyaneza, J.E. 2017. Association of potato psyllid (Bactericera cockerelli; Hemiptera: Triozidae) with Lycium spp. (Solanaceae) in potato growing regions of Washington, Idaho, and Oregon. American Journal of Potato Research. 94(5):490-499. https://doi.org/10.1007/s12230-017-9586-0.Elicitors of host plant defenses partially suppress pear psylla (Cacopsylla pyricola, Hemiptera: Psyllidae) populations under field conditions-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R. 2017. Elicitors of host plant defenses partially suppress pear psylla (Cacopsylla pyricola, Hemiptera: Psyllidae) populations under field conditions. Journal of Insect Science. 17(2):49.Minute pirate bugs-(Book / Chapter)Bacterial endosymbionts of the psyllid Cacopsylla pyricola in the Pacific Northwestern United States (Hemiptera: Psyllidae)-(Peer Reviewed Journal) Cooper, W.R., Garczynski, S.F., Horton, D.R., Unruh, T.R., Beers, E., Shearer, P., Hilton, R. 2017. Bacterial endosymbionts of the psyllid Cacopsylla pyricola in the Pacific Northwestern United States (Hemiptera: Psyllidae). Environmental Entomology. 46:393-402."Candidatus Liberibacter solanacearum” associated with the psyllid, Bactericera maculipennis (Hemiptera: Triozidae)-(Peer Reviewed Journal) Borges, K.M., Cooper, W.R., Garczynski, S.F., Thinakaran, J., Jensen, A., Horton, D.R., Munyaneza, J.E., Cueva, I., Barcenas, N. 2017. "Candidatus Liberibacter solanacearum” associated with the psyllid, Bactericera maculipennis (Hemiptera: Triozidae). Environmental Entomology. 46:210-216.New geographic records for the Nearctic psyllid Bactericera maculipennis (Crawford) with biological notes and descriptions of the egg and fifth-instar nymph (Hemiptera: Psylloidea: Triozidae)-(Peer Reviewed Journal) Horton, D.R., Miliczky, E., Lewis, T.M., Cooper, W.R., Munyaneza, J.E., Mustafa, T., Thinakaran, J., Waters, T., Wohleb, C., Jensen, A. 2017. New geographic records for the Nearctic psyllid Bactericera maculipennis (Crawford) with biological notes and descriptions of the egg and fifth-instar nymph (Hemiptera: Psylloidea: Triozidae). Entomological Society of America Proceedings. 119(2):191-214.Matrimony vine and potato psyllid in the Pacific Northwest: a worrisome marriage?-(Trade Journal) Horton, D.R., Thinakaran, J., Cooper, W.R., Munyaneza, J.E., Wohleb, C., Waters, T., Snyder, W., Fu, Z., Crowder, D., Jensen, A. 2016. Matrimony vine and potato psyllid in the Pacific Northwest: a worrisome marriage?. Potato Progress. 16:14.Assessing the likelihood of transmission of ‘Candidatus Liberibacter solanacearum’ to carrot by potato psyllid, Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Munyaneza, J.E., Mustafa, T., Fisher, T., Sengoda, V., Horton, D.R. 2016. Assessing the likelihood of transmission of ‘Candidatus Liberibacter solanacearum’ to carrot by potato psyllid, Bactericera cockerelli (Hemiptera: Triozidae). PLoS One. 11(8):e0161016. doi:10.1371/journal.pone.0161016.Gut content analysis of arthropod predators of codling moth in Washington apple orchards-(Peer Reviewed Journal) Unruh, T.R., Miliczky, E., Horton, D.R., Thomsen Archer, K.L., Rehfield-Ray, L.M., Jones, V. 2016. Gut content analysis of arthropod predators of codling moth in Washington apple orchards. Biological Control. 102:85-92.Pesticides used against Cydia pomonella disrupt biological control of secondary pests of apple-(Peer Reviewed Journal) Beers, E., Horton, D.R., Miliczky, E. 2016. Pesticides used against Cydia pomonella disrupt biological control of secondary pests of apple. Biological Control. 102:35-43.Gut content analysis of a phloem-feeding insect, Bactericera cockerelli (Sulc) (Hemiptera: Triozidae)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R., Unruh, T.R., Garczynski, S.F. 2016. Gut content analysis of a phloem-feeding insect, Bactericera cockerelli (Sulc) (Hemiptera: Triozidae). Environmental Entomology. 45:938-944.Using plant volatile traps to estimate the diversity of natural enemy communities in orchard ecosystems-(Peer Reviewed Journal) Mills, N.J., Jones, V.P., Baker, C.C., Melton, T.D., Steffan, S.A., Unruh, T.R., Horton, D.R., Shearer, P.W., Amarasekare, K.G., Miliczky, E. 2016. Using plant volatile traps to estimate the diversity of natural enemy communities in orchard ecosystems. Biological Control. 102:66-76. doi: 10.1016/j.biocontrol.2016.05.001.Nontarget effects of orchard pesticides on natural enemies: lessons from the field and laboratory-(Peer Reviewed Journal) Beers, E., Mills, N., Shearer, P., Horton, D.R., Miliczky, E., Amarasekare, K., Gontijo, L. 2016. Nontarget effects of orchard pesticides on natural enemies: lessons from the field and laboratory. Biological Control. 102:44-52.Morphological and genetic reappraisal of the Orius fauna of the western United States (Hemiptera: Heteroptera: Anthocoridae)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Garczynski, S.F., Thomsen Archer, K.L., Unruh, T.R. 2016. Morphological and genetic reappraisal of the Orius fauna of the western United States (Hemiptera: Heteroptera: Anthocoridae). Annals of the Entomological Society of America. doi: 10.1093/aesa/sav155.Horizontal transmission of "Candidatus Liberibacter solanacearum" by Bactericera cockerelli (Hemiptera: Triozidae) on Convolvulus and Ipomoea (Solanales: Convolvulaceae)-(Peer Reviewed Journal) Torres, G.L., Cooper, W.R., Horton, D.R., Swisher, K.D., Garczynski, S.F., Munyaneza, J.E., Barcenas, N.M. 2015. Horizontal transmission of "Candidatus Liberibacter solanacearum" by Bactericera cockerelli (Hemiptera: Triozidae) on Convolvulus and Ipomoea (Solanales: Convolvulaceae). PLoS One. doi: 10.1371/journal.pone.0142734.Use of Electrical Penetration Graph Technology to Examine Transmission of ‘Candidatus Liberibacter solanacearum’ to Potato by Three Haplotypes of Potato Psyllid (Bactericera cockerelli; Hemiptera: Triozidae)-(Peer Reviewed Journal) Mustafa, T., Horton, D.R., Cooper, W.R., Swisher, K.D., Zack, R.R., Pappu, H.R., Munyaneza, J.E. 2015. Use of Electrical Penetration Graph Technology to Examine Transmission of ‘Candidatus Liberibacter solanacearum’ to Potato by Three Haplotypes of Potato Psyllid (Bactericera cockerelli; Hemiptera: Triozidae). PLoS One. 10(9):e01 38946. doi:10.1371/journal.pone.0138946.Effects of elicitors of host plant defenses on pear psylla (Cacopsylla pyricola: Psyllidae)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R. 2015. Effects of elicitors of host plant defenses on pear psylla (Cacopsylla pyricola: Psyllidae). Entomologia Experimentalis et Applicata. 157:300-306.First nearctic records for Orius (Dimorphella) sibiricus Wagner (Hemiptera: Heteroptera: Anthocoridae), a Eurasian steppe inhabitant-(Peer Reviewed Journal) Lewis, T.M., Horton, D.R., Lattin, J.D. 2015. First nearctic records for Orius (Dimorphella) sibiricus Wagner (Hemiptera: Heteroptera: Anthocoridae), a Eurasian steppe inhabitant. Proceedings of the Entomological Society of Washington. 117(3):389-399.Beneficial or not? Decoding carnivore roles in plant protection-(Peer Reviewed Journal) Steffan, S.A., Chikaraishi, Y., Horton, D.R., Miliczky, E., Zalapa, J.E., Jones, V.P., Ohkouchi, N. 2015. Beneficial or not? Decoding carnivore roles in plant protection. Biological Control. 91:34-41. doi: 10.1016/j.biocontrol.2015.07.002.A new problem and old questions: potato psyllid in the Pacific Northwest-(Peer Reviewed Journal) Horton, D.R., Cooper, W.R., Munyaneza, J.E., Swisher, K.D., Echegaray, E., Murphy, A., Rondon, S., Wohleb, C., Waters, T., Jensen, A. 2015. A new problem and old questions: potato psyllid in the Pacific Northwest. American Entomologist. 61(4):234-244.Relative abundance of Carsonella ruddii (Gamma Proteobacterium) in females and males of Cacopsylla pyricola (Hemiptera: Psyllidae) and Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Cooper, W.R., Garczynski, S.F., Horton, D.R. 2015. Relative abundance of Carsonella ruddii (Gamma Proteobacterium) in females and males of Cacopsylla pyricola (Hemiptera: Psyllidae) and Bactericera cockerelli (Hemiptera: Triozidae). Journal of Insect Science. 15:65.Matrimony vine/Goji berries – potential overwintering host for potato psyllids in the Pacific Northwest-(Proceedings) Thinakaran, J., Cooper, W.R., Munyaneza, J.E., Horton, D.R. 2015. Matrimony vine/Goji berries – potential overwintering host for potato psyllids in the Pacific Northwest. Meeting Proceedings. Pp 76-79.Potato psyllids and their bacterial allies:  Two fronts in the war against zebra chip disease.-(Proceedings) Cooper, W.R., Swisher, K.D., Garczynski, S.F., Mustafa, T., Munyaneza, J.E., Horton, D.R. 2015. Potato psyllids and their bacterial allies:  Two fronts in the war against zebra chip disease.. Meeting Proceedings. Pp 1-5.Evaluating plant volatiles for monitoring natural enemies in apple, pear and walnut orchards-(Peer Reviewed Journal) Jones, V.P., Horton, D.R., Mills, N.J., Unruh, T.R., Baker, C.C., Melton, T.D., Miliczky, E., Steffan, S.A., Shearer, P.W., Amarasekare, K.G. 2015. Evaluating plant volatiles for monitoring natural enemies in apple, pear and walnut orchards. Biological Control. 102:53-65. doi: 10.1016/j.biocontrol.2015.03.009.From planning to execution to the future: An overview of a concerted effort to enhance biological control in apple, pear, and walnut orchards in the western U.S.-(Peer Reviewed Journal) Jones, V.P., Mills, N.J., Brunner, J.F., Horton, D.R., Beers, E.H., Unruh, T.R., Shearer, P.W., Goldberger, J.R., Castagnoli, S., Lehrer, N., Miliczky, E., Steffan, S.A., Amarasakare, K.G., Chambers, U., et al. 2016. From planning to execution to the future: An overview of a concerted effort to enhance biological control in apple, pear, and walnut orchards in the western U.S. Biological Control. 102:1-6. doi: 10.1016/j.biocontrol.2016.03.013.Assessing reproduction of potato psyllid haplotypes-(Proceedings) Mustafa, T., Munyaneza, J.E., Horton, D.R., Cooper, W.R., Swisher, K.D., Zack, R.S. 2015. Assessing reproduction of potato psyllid haplotypes. Meeting Proceedings. pp. 72-76.Liberibacter transmission efficiency among potato psyllid haplotypes-(Proceedings) Mustafa, T., Munyaneza, J.E., Swisher, K.D., Horton, D.R., Zack, R. 2015. Liberibacter transmission efficiency among potato psyllid haplotypes. Meeting Proceedings. pp. 68-71.Non-potato host plants of potato psyllid in the Pacific Northwest: a year-round complication?-(Trade Journal) Horton, D.R., Cooper, W.R., Munyaneza, J.E., Swisher, K.D., Wohleb, C., Waters, T., Jensen, A. 2015. Non-potato host plants of potato psyllid in the Pacific Northwest: a year-round complication?. Potato Progress. 15:2.Effects of host plant on development and body size of three haplotypes of Bactericera cockerelli (Hemiptera:Triozidae)-(Peer Reviewed Journal) Mustafa, T., Horton, D.R., Swisher, K.D., Zack, R., Munyaneza, J.E. 2015. Effects of host plant on development and body size of three haplotypes of Bactericera cockerelli (Hemiptera:Triozidae). Environmental Entomology. 44:593-600.Using plant volatile traps to develop phenology models for natural enemies: an example using Chrysopa nigricornis (Burmeister) (Neuroptera: Chrysopidae)-(Peer Reviewed Journal) Jones, V., Horton, D.R., Mills, N., Unruh, T.R., Miliczky, E., Shearer, P., Baker, C., Melton, T. 2016. Using plant volatile traps to develop phenology models for natural enemies: an example using Chrysopa nigricornis (Burmeister) (Neuroptera: Chrysopidae). Biological Control. 102:77-84.Wolbachia infection differs among divergent mitochondrial haplotypes of Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Cooper, W.R., Swisher, K.D., Garczynski, S.F., Mustafa, T., Munyaneza, J.E., Horton, D.R. 2015. Wolbachia infection differs among divergent mitochondrial haplotypes of Bactericera cockerelli (Hemiptera: Triozidae). Annals of the Entomological Society of America. 108(2):137-145.Interhaplotype fertility and host effects of potato and bittersweet nightshade on selected reproductive traits of three haplotypes of Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Mustafa, T., Horton, D.R., Cooper, W.R., Swisher, K.D., Zack, R.S., Munyaneza, J.E. 2015. Interhaplotype fertility and host effects of potato and bittersweet nightshade on selected reproductive traits of three haplotypes of Bactericera cockerelli (Hemiptera: Triozidae). Environmental Entomology. 44:300-308.Reproductive status of overwintering potato psyllid: absence of photoperiod effects-(Proceedings) Horton, D.R., Miliczky, E., Munyaneza, J.E., Swisher, K.D., Jensen, A. 2014. Reproductive status of overwintering potato psyllid: absence of photoperiod effects. Meeting Proceedings. 100-103.Beneficial or not? Carnivore trophic position under the lens of amino acid isotopic analysis-(Abstract Only) Steffan, S.A., Chikaraishi, Y., Horton, D.R., Miliczky, E., Zalapa, J.E., Jones, V., Ohkouchi, N. 2014. Beneficial or not? Carnivore trophic position under the lens of amino acid isotopic analysis [abstract]. Entomological Society of America Annual Meeting. Paper No. 1420.Wolbachia-infection differs among potato psyllid haplotypes-(Proceedings) Cooper, W.R., Mustafa, T., Swisher, K.D., Garczynski, S.F., Munyaneza, J.E., Horton, D.R. 2015. Wolbachia-infection differs among potato psyllid haplotypes. American Journal of Potato Research. 92:182.Absence of photoperiod effects on mating and ovarian maturation by three haplotypes of potato psyllid, Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Horton, D.R., Miliczky, E., Munyaneza, J.E., Swisher, K.D., Jensen, A. 2014. Absence of photoperiod effects on mating and ovarian maturation by three haplotypes of potato psyllid, Bactericera cockerelli (Hemiptera: Triozidae). Journal of British Columbia Entomological Society. 111:1-2.Trophic spectra under the lens of amino acid isotopic analysis-(Abstract Only) Steffan, S.A., Chikaraishi, Y., Horton, D.R., Miliczky, E., Zalapa, J.E., Jones, V., Ohkouchi, N. 2014. Trophic spectra under the lens of amino acid isotopic analysis [abstract]. Entomological Society of America Annual Meeting North Central Branch.What is the source of potato psyllids colonizing Washington, Oregon, and Idaho potato fields?-(Trade Journal) Horton, D.R., Munyaneza, J.E., Swisher, K.D., Echegaray, E., Murphy, A., Rondon, S., Sengoda, V., Neven, L.G., Jensen, A. 2014. What is the source of potato psyllids colonizing Washington, Oregon, and Idaho potato fields?. Potato Progress. 14(2): 1-7.Arthropod fauna of rolled alder leaves in Washington State, United States of America (Insecta: Arachnida)-(Peer Reviewed Journal) Miliczky, E., Horton, D.R., Lagasa, E. 2014. Arthropod fauna of rolled alder leaves in Washington State, United States of America (Insecta: Arachnida). The Canadian Entomologist. DOI:10.4039/tce.2013.84.Releases of insectary-reared Galendromus occidentalis (Acari: Phytoseiidae) in commercial apple orchards-(Peer Reviewed Journal) Schmidt, R.A., Beers, E.H., Unruh, T.R., Horton, D.R. 2013. Releases of insectary-reared Galendromus occidentalis (Acari: Phytoseiidae) in commercial apple orchards. Journal of Economic Entomology. 106(5):1996-2005.Gender- and species-specific characteristics of bacteriomes from three psyllid species (Hemiptera: Psylloidae)-(Peer Reviewed Journal) Cooper, W.R., Horton, D.R. 2014. Gender- and species-specific characteristics of bacteriomes from three psyllid species (Hemiptera: Psylloidae). Journal of Entomological Science. 49(2):190-194.Trophic hierarchies illuminated via amino acid isotopic analysis-(Peer Reviewed Journal) Steffan, S.A., Chikaraishi, Y., Horton, D.R., Ohkouchi, N., Singleton, M., Hogg, D.B., Miliczky, E., Jones, V. 2013. Trophic hierarchies illuminated via amino acid isotopic analysis. PLoS One. 8(9):e76152. Available: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0076152.Effect of mating on sex attraction in Bactericera cockerelli with evidence of refractoriness-(Peer Reviewed Journal) Guedot, C., Horton, D.R., Landolt, P.J., Munyaneza, J.E. 2013. Effect of mating on sex attraction in Bactericera cockerelli with evidence of refractoriness. Entomologia Experimentalis et Applicata. 149:27-35.Trophic hierarchies revealed via amino acid isotopic analysis-(Abstract Only) Steffan, S.A., Chikaraishi, Y., Horton, D.R., Ohkouchi, N. 2013. Trophic hierarchies revealed via amino acid isotopic analysis [abstract]. Ecological Society of America (ESA). Paper No. COS 59-2.Interceptions of Anthocoridae, Lasiochilidae, and Lyctocoridae at the Miami Plant Inspection Station (Hemiptera: Heteroptera)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Dobbs, T.T. 2013. Interceptions of Anthocoridae, Lasiochilidae, and Lyctocoridae at the Miami Plant Inspection Station (Hemiptera: Heteroptera). Florida Entomologist. 96(2):482-497. DOI:http://dx.doi.org/10.1653/024.096.0214.Identification of feeding stimulants for Pacific coast wireworm by use of a filter paper assay (Coleoptera: Elateridae)-(Peer Reviewed Journal) Horton, D.R., Guedot, C., Landolt, P.J. 2012. Identification of feeding stimulants for Pacific coast wireworm by use of a filter paper assay (Coleoptera: Elateridae). Journal of British Columbia Entomological Society. 109:38-47.Experimental infection of plants with an herbivore-associated bacterial endosymbiont influences herbivore host selection behavior-(Peer Reviewed Journal) Davis, T.S., Horton, D.R., Munyaneza, J.E., Landolt, P.J. 2012. Experimental infection of plants with an herbivore-associated bacterial endosymbiont influences herbivore host selection behavior. PLoS One. 7(11):e49330. doi:10.1371/journal.pone.0049330.A new species of Anthocoris (Hemiptera: Heteroptera: Anthocoridae) from western North America-(Peer Reviewed Journal) Lewis, T.M., Horton, D.R. 2012. A new species of Anthocoris (Hemiptera: Heteroptera: Anthocoridae) from western North America. Proceedings of the Entomological Society of Washington. 114(4):476-491. doi:10.4289/0013-8797.114.4.476.Previous exposure to other males leads to prolonged copulation by a predatory true bug (Hemiptera: Heteroptera: Anthocoridae)-(Research Notes) Horton, D.R. 2013. Previous exposure to other males leads to prolonged copulation by a predatory true bug (Hemiptera: Heteroptera: Anthocoridae). The Canadian Entomologist. 145:88-93.Diversity and phenology of the generalist predator community in apple orchards of Central Washington State (insecta, araneae)-(Peer Reviewed Journal) Horton, D.R., Miliczky, E., Jones, V.P., Baker, C.C., Unruh, T.R. 2012. Diversity and phenology of the generalist predator community in apple orchards of Central Washington State (insecta, araneae). The Canadian Entomologist. 144:691-710.Efforts to identify the sex pheromone of the potato psyllid-(Proceedings) Guedot, C., Horton, D.R., Landolt, P.J., Munyaneza, J.E., Millar, J. 2012. Efforts to identify the sex pheromone of the potato psyllid. Meeting Proceedings. pg 112-116.Trophic spectra reveal the community structure of a terrestrial system-(Abstract Only) Steffan, S.A., Chikaraishi, Y., Bosak, E., Horton, D.R., Ohokouchi, N., Jones, V. 2012. Trophic spectra reveal the community structure of a terrestrial system [abstract]. 2012 Ocean Sciences Meeting. Paper No. AO323.Age at reproductive maturity and effect of age and time of day on sex sttraction in the potato psyllid Bactericera cockerelli-(Peer Reviewed Journal) Guedot, C.N., Horton, D.R., Landolt, P.J. 2012. Age at reproductive maturity and effect of age and time of day on sex sttraction in the potato psyllid Bactericera cockerelli. Insect Science. 19:585-594. DOI 10.1111/j.1744-7917.2011.01498.x.Variation in male and female genitalia among ten species of North American Anthocoris (Hemiptera: Heteroptera: Anthocoridae)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M. 2011. Variation in male and female genitalia among ten species of North American Anthocoris (Hemiptera: Heteroptera: Anthocoridae). Annals of the Entomological Society of America. 104(6):1260-1278; DOI:http://DX.DOI.ORG/10.1603/AN11087.Occurrence of the western flower thrips, Franklliniella occidentalis, and potential predators on host plants in near-orchard habitats of Washington and Oregon (Thysanoptera: Thripidae)-(Peer Reviewed Journal) Miliczky, E., Horton, D.R. 2011. Occurrence of the western flower thrips, Franklliniella occidentalis, and potential predators on host plants in near-orchard habitats of Washington and Oregon (Thysanoptera: Thripidae). Journal of British Columbia Entomological Society. 108:11-28.Sex Attraction in Pear Psylla-(Proceedings) Guedot, C.N., Horton, D.R., Landolt, P.J. 2011. Sex Attraction in Pear Psylla. Washington State Horticulture Association Proceedings. 106th Annual Meeting 2010 Proceedings, pp 146-147.Response of summerform pear psylla (Hemiptera: Psyllidae) to male- and female-produced odors-(Peer Reviewed Journal) Guedot, C.N., Horton, D.R., Landolt, P.J. 2011. Response of summerform pear psylla (Hemiptera: Psyllidae) to male- and female-produced odors. The Canadian Entomologist. 143:245-253.Entomopathogenic fungi (Hypocreales) for control of potato psyllid, Bactericerta cockerelli (Sulc)(Hemiptera: Triozidae) in an area endemic for zebra chip disease of potato-(Peer Reviewed Journal) Lacey, L.A., Liu, T.X., Buchman, J., Munyaneza, J.E., Goolsby, J., Horton, D.R. 2011. Entomopathogenic fungi (Hypocreales) for control of potato psyllid, Bactericerta cockerelli (Sulc)(Hemiptera: Triozidae) in an area endemic for zebra chip disease of potato. Biological Control. 56:271-278.Orius diespeter Herring in North America: Color Variation and Updated Distribution (Hemiptera: Heteroptera: Anthocoridae)-(Peer Reviewed Journal) Lewis, T.M., Horton, D.R. 2010. Orius diespeter Herring in North America: Color Variation and Updated Distribution (Hemiptera: Heteroptera: Anthocoridae). Proceedings of the Entomological Society of Washington. 112(4):541-554.Evaluation of herbivore-induced plant volatiles for monitoring lacewings in Washington apple orchards-(Peer Reviewed Journal) Jones, V.P., Steffan, S.A., Wiman, N.G., Horton, D.R., Miliczky, E., Zhang, Q., Baker, C.C. 2010. Evaluation of herbivore-induced plant volatiles for monitoring lacewings in Washington apple orchards. Biological Control. 56:98-105.Sex Attraction in Bactericera cockerelli (Hemiptera: Triozidae)-(Peer Reviewed Journal) Guedot, C.N., Horton, D.R., Landolt, P.J. 2010. Sex Attraction in Bactericera cockerelli (Hemiptera: Triozidae). Environmental Entomology 39(4):1302-1308.Identity of two sympatric species of Orius (Heteroptera: Anthocoridae)-(Peer Reviewed Journal) Shapiro, J.P., Shirk, P.D., Kelley, K., Lewis, T.M., Horton, D.R. 2010. Identity of two sympatric species of Orius (Heteroptera: Anthocoridae). Journal of Insect Science. 10:189.Identification of a Sex Attractant Pheromone for Male Winterform Pear Psylla, Cacopsylla pyricola-(Peer Reviewed Journal) Guedot, C.N., Millar, J.G., Horton, D.R., Landolt, P.J. 2009. Identification of a Sex Attractant Pheromone for Male Winterform Pear Psylla, Cacopsylla pyricola. Journal of Chemical Ecology. 35:1437-1447.Tree fruit IPM programs in the Western United States: the challenge of enhancing biological control through intensive management-(Peer Reviewed Journal) Jones, V., Unruh, T.R., Horton, D.R., Mills, N., Brunner, J., Beers, E., Shearer, P. 2009. Tree fruit IPM programs in the Western United States: the challenge of enhancing biological control through intensive management. Pest Management Science. 65:1305-1310.Insecticidal Activity of Entomopathogenic Fungi (Hypocreales) for Potato Psyllid, Bactericera cockerelli (Hemiptera: Triozidae): Development of Bioassay Techniques, Effect of Fungal Species and Stage of the Psyllid-(Peer Reviewed Journal) Lacey, L.A., De La Rosa, F., Horton, D.R. 2009. Insecticidal Activity of Entomopathogenic Fungi (Hypocreales) for Potato Psyllid, Bactericera cockerelli (Hemiptera: Triozidae): Development of Bioassay Techniques, Effect of Fungal Species and Stage of the Psyllid. Biocontrol Science and Technology. 19:957-970. DOI: 10.1080/09583150903243904  http://www.informaworld.comAttraction of Cacopsylla pyricola (Hemiptera: Psyllidae) to Female Psylla in Pear Orchards-(Peer Reviewed Journal) Brown, R.L., Landolt, P.J., Horton, D.R., Zack, R.S. 2009. Attraction of Cacopsylla pyricola (Hemiptera: Psyllidae) to Female Psylla in Pear Orchards. Environmental Entomology 38(3):815-822.Attraction of Male Winterform Pear Psylla to Female-produced Volatiles and to Female Extracts and Evidence of Male-Male Repellency-(Peer Reviewed Journal) Guedot, C.N., Horton, D.R., Landolt, P.J. 2009. Attraction of Male Winterform Pear Psylla to Female-produced Volatiles and to Female Extracts and Evidence of Male-Male Repellency. Entomologia Experimentalis et Applicata 130:191-197.No Effects of an Autumn Mustard Crop on Wireworm Densities or Damaage to Potatoes in the Following Growing Season-(Trade Journal) Horton, D.R. 2008. No Effects of an Autumn Mustard Crop on Wireworm Densities or Damaage to Potatoes in the Following Growing Season. Potato Progress. 8:1-4.Efficacy of the Biofumigant Fungus Muscodor albus (Ascomycota: Xylariales) for Control of Codling Moth (Lepidoptera: Tortricidae) in Simulated Storage Conditions-(Peer Reviewed Journal) Lacey, L.A., Horton, D.R., Jones, D.C., Headrick, H.L., Neven, L.G. 2009. Efficacy of the Biofumigant Fungus Muscodor albus (Ascomycota: Xylariales) for Control of Codling Moth (Lepidoptera: Tortricidae) in Simulated Storage Conditions. Journal of Economic Entomology 102:43-49.Use of a New Immunomarking Method to Assess Movement by Generalist Predators Between a Cover Crop and Tree Canopy in a Pear Orchard-(Peer Reviewed Journal) Horton, D.R., Jones, V.P., Unruh, T.R. 2009. Use of a New Immunomarking Method to Assess Movement by Generalist Predators Between a Cover Crop and Tree Canopy in a Pear Orchard. American Entomologist. Vol 55(1):49-56.DEVELOPMENT OF MONOCLONAL ANTIBODIES TO PEAR PSYLLA (HEMIPTERA: PSYLLIDAE) AND EVALUATION OF FIELD PREDATION BY TWO KEY PREDATORS-(Peer Reviewed Journal) Unruh, T.R., Yu, T., Willett, L.S., Garczynski, S.F., Horton, D.R. 2008. DEVELOPMENT OF MONOCLONAL ANTIBODIES TO PEAR PSYLLA (HEMIPTERA: PSYLLIDAE) AND EVALUATION OF FIELD PREDATION BY TWO KEY PREDATORS. Annals of the Entomological Society of America. 101(5):887-898.ATTRACTION OF MALE SUMMERFORM PEAR PSYLLA TO VOLATILES FROM FEMALE PSYLLA: EFFECTS OF FEMALE AGE, MATING STATUS, AND PRESENCE OF HOST PLANT-(Peer Reviewed Journal) Horton, D.R., Guedot, C.N., Landolt, P.J. 2008. Attraction of male summerform pear psylla to volatiles from female psylla: effects of female age, mating status, and presence of host plant. The Canadian Entomologist 140:184-191.SPATIAL PATTERNS OF WESTERN FLOWER THRIPS IN APPLE ORCHARDS AND ASSOCIATED FRUIT DAMAGE-(Peer Reviewed Journal) Miliczky, E., Cockfield, S.D., Beers, E.H., Horton, D.R. 2007. Spatial patterns of western flower thrips in apple orchards and associated fruit damage. Journal of British Columbia Entomological Society 104:25-33.TIMING OF OVIPOSITION OF THRIPS (THYSANOPTERA: THRIPIDAE) IN APPLE FRUIT-(Peer Reviewed Journal) Cockfield, S.D., Beers, E.H., Horton, D.R., Miliczky, E. 2007. Timing of oviposition of thrips (thysanoptera: thripidae) in apple fruit. Journal of British Columbia Entomological Society 104:45-53.Minute pirate bugs (Hemiptera: Anthocoridae)-(Book / Chapter) Horton, D.R. 2008. Minute pirate bugs (Hemiptera: Anthocoridae). In: J.. Capinera (ed.), Encyclopedia of Entomology, 2nd edition. Vol 3, pp 2402-2412.  Springer.How Do Wireworms Find Their Host Plants?-(Trade Journal) Horton, D.R. 2007. How Do Wireworms Find Their Host Plants?. Potato Progress 7 (#10): 1-3.Natural Enemy Fauna (Insecta, Araneae) Found on Native Sagebrush Steppe Plants in Eastern Washington with Reference to Species Also Found in Adjacent Apple and Pear Orchards-(Peer Reviewed Journal) Miliczky, E., Horton, D.R. 2007. Natural Enemy Fauna (Insecta, Araneae) Found on Native Sagebrush Steppe Plants in Eastern Washington with Reference to Species Also Found in Adjacent Apple and Pear Orchards. Pan Pacific Entomology 83(1):50-65.DIAPAUSE STATUS OF FEMALES AFFECTS ATTRACTION OF MALE PEAR PSYLLA, CACOPSYLLA PYRICOLA, TO VOLATILES FROM FEMALE-INFESTED PEAR SHOOTS-(Peer Reviewed Journal) Horton, D.R., Guedot, C.N., Landolt, P.J. 2007. Diapause status of females affects attraction of male pear psylla, cacopsylla pyricola, to volatiles from female-infested pear shoots. Entomologia Experimentalis et Applicata. 123:185-192.ATTRACTION OF MALE PEAR PSYLLA, CACOPSYLLA PYRICOLA, TO FEMALE-INFESTED PEAR SHOOTS-(Peer Reviewed Journal) Horton, D.R., Landolt, P.J. 2007. Attraction of male pear psylla, cacopsylla pyricola, to female-infested pear shoots. Entomologia Experimentalis et Applicata. 123:177-183.Improving Apple IPM by maximizing opportunities for biological control.-(Popular Publication) Jones, V.P., Unruh, T.R., Horton, D.R., Brunner, J.F. 2006. Improving Apple IPM by maximizing opportunities for biological control. Good Fruit Grower. Dec. 2006, p. 1-8.Quantitative relationship between potato tuber damage and counts of Pacific Coast wireworm (Coleoptera: Elateridae) in baits: seasonal effects.-(Peer Reviewed Journal) Horton, D.R. 2006. Quantitative relationship between potato tuber damage and counts of Pacific Coast wireworm (Coleoptera: Elateridae) in baits: seasonal effects. Journal of British Columbia Entomological Society, 103:37-48.PEAR INSECTS, ECOLOGY AND CONTROL-(Book / Chapter) Horton, D.R., Unruh, T.R. 2007. Pear Insects: Ecology and Control. Encyclopedia of Pest Management, 1:1, 1-4.  URL: http://dx.doi.org/10.1081/E-EPM-120041162HOW DEEP ARE WIREWORMS IN THE SPRING?-(Popular Publication) Horton, D.R. 2005. How deep are wireworms in the spring?. Potato Progress. V(12):2-4.PROGENY OF A TRI-SPECIES POTATO SOMATIC HYBRID EXPRESS RESISTANCE TO WIREWORM IN EASTERN AND WESTERN POTATO PRODUCTION REGIONS OF THE U.S.-(Peer Reviewed Journal) Novy, R.G., Alvarez, J.M., Sterret, S.B., Kuhar, T.P., Horton, D.R. 2006. Progeny of a tri-species potato somatic hybrid express resistance to wireworm in eastern and western potato production regions of the u.s.. American Journal of Potato Research.83(1):126OVARIAN DEVELOPMENT AND LIPID RESERVES ARE AFFECTED BY MATING DELAYS IN THREE SPECIES OF ANTHOCORIS (HETEROPTERA: ANTHOCORIDAE)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Neven, L.G. 2005. Ovarian development and lipid reserves are affected by mating delays in three species of anthocoris (heteroptera: anthocoridae). The Canadian Entomologist. 137(3):328-336.NEW STATE AND UNITED STATES RECORDS FOR ANTHOCORIDAE (HEMIPTERA: HETEROPTERA)-(Peer Reviewed Journal) Lewis, T.M., Horton, D.R., Broers, D.A. 2005. New state and United States records for Anthocoridae (Hemiptera:Heteroptera). Pan Pacific Entomology. 81:59-67.BIOLOGY OF PACIFIC COAST AND SUGARBEET WIREWORM IN THE COLUMBIA BASIN-(Trade Journal) Horton, D.R. 2004. Biology of Pacific coast and sugarbeet wireworm in the Columbia Basin. Potato Progress. IV(10):1-4.ECOLOGICAL AND GEOGRAPHIC RANGE EXPANSION OF THE INTRODUCED PREDATOR ANTHOCORIS NEMORALIS (HETEROPTERA:ANTHOCORIDAE)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Broers, D.A. 2004. Ecological and geographic range expansion of the introduced predator Anthocoris nemoralis (Heteroptera:Anthocoridae). American Entomologist. 50:18-30.NUMBERS AND TYPES OF ARTHROPODS OVERWINTERING ON COMMON MULLEIN, VERBASCUM THAPUS L. (SCROPHULARIACEAE), IN A CENTRAL WASHINGTON FRUIT-GROWING REGION-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M. 2003. Numbers and types of arthropods overwintering on common mullein, Verbascum thapus L (Scrophulariaceae), in a central Washington fruit-growing region. Journal of Entomological Society of British Columbia. 100:79-87.ANTHOCORIS TRISTIS VAN DUZEE, 1921, A SYNONYM OF ANTHOCORIS WHITEI REUTER, 1884 (HEMIPTERA: HERTEROPTERA: ANTHOCORIDAE)-(Peer Reviewed Journal) Lewis, T.M., Horton, D.R., Lattin, J.D. 2004. Anthocoris tristis Van Duzee, 1921, a synonym of Anthocoris whitei, Reuter, 1884 (Hemiptera: Heteroptera: Anthocoridae). Pan-Pacific Entomologist. 79:155.MICROBIAL CONTROL OF THE COLORADO POTATO BEETLE IN IRRIGATED DESERT: COMBINATIONS AND ALTERNATIONS OF BACILLUS THURINGIENSIS AND BEAUVERIA BASSIANA-(Abstract Only) Lacey, L.A., Horton, D.R. 2003. Microbial control of the Colorado potato beetle in irrigated desert: combinations and alternations of Bacillus thuringiensis and Beauveria bassiana. Society of Invertebrate Pathology. p.59.PEAR PSYLLA, CACOPSYLLA PYRICOLA (FOERSTER) (HOMOPTERA:PSYLLIDAE)-(Book / Chapter) Horton, D.R. 2004. Pear psylla, Cacopsylla pyricola (Foerster) (Homoptera:Psyllidae). In: J.L. Capinera (ed.), Encyclopedia of Entomology. Kluwer Academic Publishers.FREQUENCY OF MOWING AND EFFECTS ON DENSITIES OF NATURAL ENEMIES IN THE GROUND COVER, IN THE TREE CANOPY, AND ON THE ORCHARD FLOOR AT THREE PACIFIC NORTHWEST PEAR ORCHARDS-(Peer Reviewed Journal) Horton, D.R., Broers, D., Lewis, R., Granatstein, D., Zack, R., Unruh, T.R., Moldenke, A., Brown, J. 2003. Frequency of mowing and effects on densities of natural enemies in the ground cover, in the tree canopy, and on the orchard floor at three Pacific Northwest pear orchards. Entomologia Experimentalis et Applicata. 106:135-145.DIVERSITY AND PHENOLOGY OF PREDATORY ARTHROPODS OVERWINTERING IN CARDBOARD BANDS PLACED IN PEAR AND APPLE ORCHARDS OF CENTRAL WASHINGTON-(Peer Reviewed Journal) Horton, D.R., Broers, D.A., Hinojosa, T.L., Lewis, T.M., Miliczky, E.R., Lewis, R.R. 2002. Diversity and phenology of predatory arthropods overwintering in cardboard bands placed in pear and apple orchards of central Washington. Annals of the Entomological Society of America. 95:469-480.ORIENTATION RESPONSE OF THE PACIFIC COAST WIREWORM (COLEOPTERA: ELATERIDAE) TO FOOD BAITS IN THE LABORATORY AND EFFECTIVENESS OF BAITS IN THE FIELD-(Peer Reviewed Journal) Horton, D.R., Landolt, P.J. 2002. Orientation response of the Pacific coast wireworm (Coleoptera: Elateridae) to food baits in the laboratory and effectiveness of baits in the field. The Canadian Entomologist. 134:357-367.COPULATION DURATION IN THREE SPECIES OF ANTHOCORIS (HETEROPTERA: ANTHOCORIDAE) AT DIFFERENT TEMPERATURES AND EFFECTS ON INSEMINATION AND OVARIAN DEVELOPMENT-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Hinojosa, T.L. 2002. Copulation duration in three species of Anthocoris (Heteroptera: Anthocoridae) at different temperatures and effects on insemination and ovarian development. Pan-Pacific Entomologist. 73:43-55.MONITORING OF WIREWORM LARVAE IN POTATOES-(Trade Journal) Landolt, P.J., Horton, D.R. 2001. Monitoring of wireworm larvae in potatoes. Potato Progress. 1:1-2.BUCHANANIELLA CONTINUA (WHITE) FROM CALIFORNIA, AN ANTHOCORIDAE NEW TO THE UNITED STATES WITH NEW SYNONYMY (HEMIPTERA:  HETEROPTERA)-(Proceedings) Lattin, J.D., Lewis, T.M., Horton, D.R. 2001. Buchananiella continua (white) from California, an anthocoridae new to the United States with new synonymy (Hemiptera: Heteroptera). Proceedings of the Entomological Society of Washington. 103:558-560.SEASONAL DISTRIBUTION OF ANTHOCORIS SPP. AND DERAEOCORIS BREVIS (UHLER) IN SOME ORCHARD AND NON-ORCHARD HABITATS OF CENTRAL WASHINGTON (HETEROPTERA: ANTHOCORIDAE, MIRIDAE)-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M. 2000. Seasonal distribution of Anthocoris spp. and Deraeocoris brevis (Uhler) in some orchard and non-orchard habitats of central Washington (Heteroptera: Anthocoridae, Miridae). Annals of the Entomological Society of America. 93:476-485.USE OF JAPANESE BEETLE TRAPS TO MONITOR FLIGHT OF THE PACIFIC COAST WIREWORM, LIMONIUS CANUS (COLEOPTERA: ELATERIDAE), AND EFFECTS OF TRAP HEIGHT AND COLOR-(Peer Reviewed Journal) Horton, D.R., Landolt, P.J. 2002. Use of Japanese beetle traps to monitor flight of the Pacific coast wireworm, Limonius canus (Coleoptera: Elateridae), and effects of trap height and color. Journal of the  Entomological Society of British Columbia. 98:235-242.COPULATION DURATION AND PROBABILITY OF INSEMINATION IN ANTHOCORIS WHITEI REUTER (HETEROPTERA: ANTHOCORIDAE) AS A FUNCTION OF MALE BODY SIZE-(Peer Reviewed Journal) Horton, D.R., Lewis, T.M., Hinojosa, T.L. 2001. Copulation duration and probability of insemination in Anthocoris whitei Reuter (Heteroptera: Anthocoridae) as a function of male body size. The Canadian Entomologist. 133:109-117.NUMBERS, DIVERSITY, AND PHENOLOGY OF SPIDERS (ARANEAE) OVERWINTERING IN CARDBOARD BANDS PLACED IN PEAR AND APPLE ORCHARDS OF CENTRAL WASHINGTON-(Peer Reviewed Journal) Horton, D.R., Miliczky, E.R., Broers, D.A., Lewis, R.R., Calkins, C.O. 2001. Numbers, diversity, and phenology of spiders (Araneae) overwintering in cardboard bands placed in pear and apple orchards of central Washington. Annals of the Entomological Society of America. 95:469-480.NATURAL ENEMIES IN ORCHARDS:  SOME TOPICS FOR RESEARCH-(Trade Journal) Horton, D.R. 2000. Natural enemies in orchards:  some topics for research. Good Fruit Grower. 51(12):17-18.THE POTENTIAL FOR INSECT PATHOGENS AS CONTROL AGENTS OF PEST INSECTS OF POTATO.-(Proceedings) Lacey, L.A., Horton, D.R. 2000. The potential for insect pathogens as control agents of pest insects of potato. Proceedings Washington State Potato Conference. 85-87.MATING PREFERENCE, MATING PROPENSITY, AND REPRODUCTIVE TRAITS IN ANTHOCORIS NEMORALIS (FABRICIUS) (HETEROPTERA: ANTHOCORIDAE): A COMPARISON OF CALIFORNIA AND UNITED KINGDOM POPULATIONS-(Peer Reviewed Journal) Horton, D.R., Hinojosa, T.L., Lewis, T.M. 2000. Mating preference, mating propensity, and reproductive traits in Anthocoris nemoralis (Fabricius) (Heteroptera: Anthocoridae): a comparison of California and United Kingdom populations. Annals of the Entomological Society of America. 93:663-672.SPIDER ABUNDANCE AND DIVERSITY IN APPLE ORCHARDS UNDER THREE INSECT PEST MANAGEMENT PROGRAMS IN WASHINGTON STATE-(Peer Reviewed Journal) Miliczky, E.R., Calkins, C.O., Horton, D.R. 2000. Spider abundance and diversity in apple orchards under three insect pest management programs in Washington state. Agricultural and Forest Meteorology. 2:203-215.COMPARATIVE EFFICACY OF BEAUVERIA BASSIANA, BACILLUS THURINGIENSIS, AND ALDICARB FOR CONTROL OF COLORADO POTATO BEETLE IN AN IRRIGATED DESERT AGROECOSYSTEM AND THEIR EFFECTS ON BIODIVERSITY-(Peer Reviewed Journal) Lacey, L.A., Horton, D.R., Chauvin, R.L., Stocker, J.M. 1999. Comparative efficacy of Beauveria bassiana, Bacillus thuringiensis, and Aldicarb for control of Colorado potato beetle in an irrigated desert agroecosystem and their effects on biodiversity. Entomologia Experimentalis et Applicata. 93:189-200.


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