Resistance to insecticides in populations of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) from greenhouses in the Niagara region of Ontario

被引:65
作者
Broadbent, AB [1 ]
Pree, DJ [1 ]
机构
[1] Agr & Agri Food Canada, Pest Management Res Ctr, Vineland Stn, ON L0R 2E0, Canada
关键词
D O I
10.4039/Ent129907-5
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Resistance was documented in 1995 to commonly used organophosphorus, carbamate, and pyrethroid insecticides in populations of western flower thrips, Frankliniella occidentalis (Pergande), from six commercial greenhouses in Ontario. Adult female thrips were placed in glass vials treated with technical-grade insecticides and mortality at 18 h was compared with a single discriminating concentration, the computed LC99 of a reference laboratory population. Baseline dose-response regressions for insecticides commonly used in Ontario greenhouses were obtained for the laboratory population of western flower thrips. The organophosphorus compounds chlorpyrifos and malathion and the carbamates methomyl and bendiocarb were the most toxic materials tested; whereas the pyrethroid deltamethrin and a phosphoroamidate acephate were the least toxic. The addition of piperonyl butoxide to solutions of deltamethrin was highly synergistic. The mixture of deltamethrin and endosulfan (1:1) was moderately synergistic. Populations of western flower thrips from commercial greenhouses were resistant to deltamethrin, but deltamethrin mixed with piperonyl butoxide or endosulfan was synergistic in all cases. None of the populations were resistant to all of the insecticides tested. Recommendations are presented for the development of a resistance-management strategy for western flower thrips.
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页码:907 / 913
页数:7
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