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Laboratory studies of insecticide efficacy and resistance in Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) populations from British Columbia, Canada
Author(s) -
Smirle Michael J,
Zurowski Cheryl L,
Ayyanath MuraliMohan,
Scott Ian M,
MacKenzie Kenna E
Publication year - 2017
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4310
Subject(s) - drosophila suzukii , biology , malathion , toxicology , pest analysis , drosophila (subgenus) , population , orchard , drosophilidae , integrated pest management , pesticide resistance , bioassay , microbiology and biotechnology , pesticide , agronomy , drosophila melanogaster , ecology , horticulture , genetics , medicine , environmental health , gene
BACKGROUND Spotted wing drosophila ( SWD ), Drosophila suzukii (Matsumura), control can be improved with better knowledge of insecticide efficacy, timing of sprays and rotations with registered products during the crop year. An efficacy bioassay was applied to study the dose response of adult laboratory‐reared SWD collected from a cherry orchard in British Columbia ( BC ), Canada, to 11 insecticides. RESULTS Age‐ and sex‐specific toxicities with the most effective insecticide, malathion, determined that older male SWD were significantly more susceptible than females. The selection for polygenic resistance to malathion using repeated exposure to sublethal concentrations with both the original and an additional blueberry‐collected population of laboratory‐reared SWD determined no significant difference in susceptibility after 30 generations. CONCLUSION Possible reasons reported in D. melanogaster studies where resistance did not occur after insecticide selection included avoidance and associated microbial complexes. The low level of malathion resistance observed in the selected SWD populations and a field‐collected population is useful information in the development of insecticide resistance management programmes. © 2016 Her Majesty the Queen in Right of Canada Pest Management Science © 2016 Society of Chemical Industry