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Baseline susceptibility of spotted wing Drosophila ( Drosophila suzukii ) to four key insecticide classes
Author(s) -
Van Timmeren Steven,
MotaSanchez David,
Wise John C,
Isaacs Rufus
Publication year - 2018
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.4702
Subject(s) - drosophila suzukii , drosophila (subgenus) , biology , pest analysis , integrated pest management , spinosad , drosophilidae , toxicology , malathion , pest control , insecticide resistance , methomyl , pesticide , horticulture , agronomy , drosophila melanogaster , genetics , gene
BACKGROUND The invasive drosophilid pest, Drosophila suzukii Matsumura, is affecting berry production in most fruit‐producing regions of the world. Chemical control is the dominant management approach, creating concern for insecticide resistance in this pest. We compared the insecticide susceptibility of D. suzukii populations collected from conventional, organic or insecticide‐free blueberry sites. RESULTS The sensitivity of D. suzukii to malathion and spinetoram declined slightly across the 3 years of monitoring, whereas it was more consistent for methomyl and zeta‐cypermethrin. The sensitivity of D. suzukii to all four insecticides (LC 50 and LC 90 values) did not differ significantly among the blueberry fields using different management practices. CONCLUSIONS The baseline sensitivity of D. suzukii has been characterized, allowing future comparisons if field failures of chemical control are reported. The concentration achieving high control indicates that effective levels of control can still be achieved with field rates of these four insecticides. However, declining susceptibility of some populations of D. suzukii to some key insecticides highlights the need for resistance monitoring. © 2017 Society of Chemical Industry