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用阿维菌素对小菜蛾进行室内抗性汰选,选择压为约杀死种群70％的剂量。连续施药7～8次即表现抗性趋势,汰选至11代,获得抗性指数为80.71的抗性种群(ABM-R)。ABM-R种群对所测试的有机磷杀虫剂乙酰甲胺磷、有机氯类的硫丹、沙蚕毒素类的杀螟丹、氨基甲酸酯类的灭多威、微生物杀虫剂Bt、磺胺脲类衍生物丁醚脲、芳基取代的吡咯杂环化合物虫螨腈和昆虫生长调节剂定虫隆、虫酰肼无交互抗性(R/S为0.73～1.19),而对苯基吡唑类氟虫腈的敏感性却有所上升(R/S为0.22)。增效剂试验显示,PB和唧对ABM-S种群无增效作用,而对ABM-R种群增效作用显著,增效比分别为24.57和13.61,表明多功能氧化酶和羧酸酯酶在抗性机制中可能起重要作用。
Avermectins against Plutella xylostella were eliminated in house, selecting a pressure of about 70% of the population to kill the dose. The resistant trend was showed after 7-8 times of continuous application, and the resistant population (ABM-R) with resistance index of 80.71 was obtained after 11 generations of selection. ABM-R population was tested against the tested organophosphate insecticides, acephate, organochlorine endosulfan, nereidoxin, methomyl carbamate, microbial insecticide Bt, sulfonamide Urea derivatives such as diafenthiuron, aryl-substituted pyrrole heterocyclic compounds and insecticide growth insecticide insecticide and tebufenozide had no interaction resistance (R / S 0.73 ~ 1.19) The sensitivity of azole fipronil has increased (R / S 0.22). Synergist test showed that PB and jack did not synergize ABM-S population, but had significant synergistic effects on ABM-R population with synergistic ratios of 24.57 and 13.61, respectively, suggesting that multifunctional oxidase and carboxylesterase Resistance mechanisms may play an important role.