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期 刊 ：植物保护学报 2008年

关键词：斜纹夜蛾；茚虫威；抗性选育；现实遗传力；交互抗性；

Keywords:Spodoptera litura, indoxacarb, resistance selection, realized heritability, cross-resistance,

摘 要 ：为评估茚虫威抗性风险,在室内进行了斜纹夜蛾对茚虫威的抗性选育和交互抗性测定。经过10代6次室内抗性选育,获得了斜纹夜蛾对茚虫威抗性种群,与选育前相比,斜纹夜蛾对茚虫威的敏感性降低了15.63倍。抗性风险评估结果表明,斜纹夜蛾具有对茚虫威产生高水平抗性的风险。交互抗性测定发现,辛硫磷、高效氯氰菊酯和氟虫腈对茚虫威抗性种群的LC₅₀值分别是同源对照种群的1.53、2.42和1.53倍,溴虫腈和灭多威对茚虫威抗性种群的LC₅₀值分别是同源对照种群的0.78和0.96倍,表明茚虫威抗性种群对这几种杀虫剂未产生交互抗性。

Abstract:The common cutworm, Spodoptera litura (Fabricius), was a worldwide-distributed agricultural pest. Indoxacarb was an ideal candidate to substitute organophosphate and pyrethroid insecticides. To evaluate the resistance risk of S.litura to indoxacarb, resistance selection was conducted in the laboratory, and cross-resistance of indoxacarb-resistant S.litura population was investigated. After selection with indoxacarb 6 times during 10 generations, a resistant population of S.litura was achieved with resistance ratio of 15.63 compared with unselected parent population, suggesting that S.litura had high potential to develop resistance to indoxacarb, as was confirmed by resistance risk assessment. Bioassay showed that the LC₅₀ values of phoxim, betacypermethrin, fipronil were 1.53, 2.42 and 1.53 folds higher in resistant population than that in unselected parent population, respectively, while the LC₅₀ values of chlorfennapyr and methomyl were 0.78 and 0.96 folds lower in resistant population than that in unselected parent population, suggesting that indoxacarb-resistant S.litura had little cross-resistance to these tested insecticides.

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