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ARS Home » Pacific West Area » Wapato, Washington » Temperate Tree Fruit and Vegetable Research » Research » Publications at this Location » Publication #345582
Research Project: New Technologies and Strategies to Manage the Changing Pest Complex on Temperate Fruit Trees

Location: Temperate Tree Fruit and Vegetable Research

Title: Spatial analysis of seasonal dynamics and overwintering of Drosophila suzukii (Diptera: Drosophilidae) in the Okanagan-Columbia Basin, 2010-2014

Author
item THISTLEWOOD, H - Agriculture And Agri-Food Canada
item GILL, P - University Of British Columbia
item BEERS, E - Washington State University
item SHEARER, P - Washington State University
item WALSH, D - Washington State University
item ROZEMA, B - Agriculture And Agri-Food Canada
item ACHEAMPONG, S - British Colombia Ministry Of Agriculture And Lands
item CASTAGNOLI, S - Oregon State University
item Yee, Wee
item SMYTHEMAN, P - Washington State University
item WHITENER, A - Washington State University

Submitted to: Environmental Entomology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/19/2017
Publication Date: 2/28/2021
Citation: Thistlewood, H.M., Gill, P., Beers, E.H., Shearer, P.W., Walsh, D.B., Rozema, B., Acheampong, S., Castagnoli, S., Yee, W.L., Smytheman, P., Whitener, A.B. 2021. Spatial analysis of seasonal dynamics and overwintering of Drosophila suzukii (Diptera: Drosophilidae) in the Okanagan-Columbia Basin, 2010-2014. Environmental Entomology. 47(2):221-232. https://doi.org/10.1093/ee/nvx178.
DOI: https://doi.org/10.1093/ee/nvx178

Interpretive Summary: Spotted wing drosophila is a pest of tree fruit and small fruit crops in the Pacific Northwest of North America. The ability of the fly to overwinter and survive in the interior fruit-growing areas in this region are not well known. Personnel at Agriculture and Agri-Food Canada, Summerland, B.C. University of British Columbia, B.C., Washington State University, Wenatchee, WA, Oregon State University, Hood River, OR, Washington State University, Pullman, WA, B.C. Ministry of Agriculture, B.C., and USDA-ARS, Yakima Agricultural Research Laboratory, Wapato, WA, conducted a 5-year study to determine the seasonal dynamics and overwintering of the fly in British Columbia, Canada, Oregon, U.S.A., and Washington State, U.S.A. using a spatial analysis. The results show that spotted wing drosophila is well adapted to the mixed landscapes of this region, with cold winters and hot dry summers, and have important implications for management and biological control.

Technical Abstract: Spotted wing Drosophila, Drosophila suzukii Matsumura, was monitored from 2010-14, using traps baited with apple cider vinegar or sugar-water-yeast, in 314-828 sites of interior fruit-growing regions of OR and WA, USA, and BC, Canada. Seasonal population dynamics and sex ratios were summarized for berry, cherry, stone fruit, grape, non-crop host plants, non-host sites, and for conventional IPM, certified organic, backyard, and feral sites, by region and year. Overwintering was detected in all regions and years, despite winter temperatures below -17 oC. A spatially explicit analysis was conducted using a geographical information system (GIS), daily weather data, geomorphometric measures of terrain, distance to water, and other variables, at each site. The Julian week of first capture of D. suzukii in cherry habitats was significantly related (R2=0.49) to year, pesticide treatment, and number of winter days with temperatures >-5 °C. In berry, cherry, stone fruit and grape habitats, 2011-14, it was significantly related (R2=0.42) to year, pesticide treatment at the site, the logarithm of peak population of D. suzukii in the prior autumn, latitude, elevation, and topographic wetness index. The results show that D. suzukii is well adapted to the mixed landscapes of this region, with cold winters and hot dry summers, and have important implications for management and biological control.