Changes in susceptibility to conventional insecticides of a Cry1Ac-selected population of Helicoverpa armigera (Hubner) (Lepidoptera : Noctuidae)

文献类型： 外文期刊

第一作者： Guo, YY

作者： Guo, YY

作者机构：

关键词： H armigera;Bt toxin;insecticide;resistance management

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

ISSN： 1526-498X

年卷期： 2004 年 60 卷 7 期

页码：

收录情况： SCI

摘要： The changes in the susceptibility of the cotton bollworm, Helicoverpa armigera (Hubner) to three insecticides (lambda-cyhalothrin, phoxim and endosulfan) commonly used for control of this pest in China were monitored by bioassays at various generations. The insects were originally collected from Bt cotton fields and selected with Cry1Ac over 44 generations. In comparison with a susceptible strain, the larval resistance of the Bt-selected populations to Cry1Ac toxin increased 106-fold. Simultaneously, the resistance levels to lambda-cyhalothrin, phoxim and endosulfan declined dramatically. The results indicated no positive cross-resistance between Cry1Ac toxin and the insecticides. Evidence of the lack of cross-resistance to three commonly used synthetic insecticides in our laboratory-derived Cry1Ac-resistant population may suggest that growers can confidently use these insecticides if and when resistance to Cry1Ac cotton does occur. (C) 2004 Society of Chemical Industry.

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