Long-term changes in pest resistance dynamics in China and Australia in response to the introduction of Bt cotton and patterns of insecticide use

文献类型： 外文期刊

第一作者： Zhao, Huaizhi

作者： Zhao, Huaizhi;Fan, Yinjun;Lu, Zhaozhi;Downes, Sharon;Bird, Lisa;Zalucki, Myron P.;Xie, Zongming;Ahmad, Munir

作者机构：

关键词： insecticide resistance management (IRM); area-wide management; economic threshold; Bt cotton; Helicoverpa armigera; Aphis gossypii

期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：6.9； 五年影响因子：5.2 ）

ISSN： 0171-8177

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Crops expressing insecticidal crystal proteins of Bacillus thuringiensis (Bt), often provide an opportunity for lower resistance selection toward synthetic pesticides due to reduced spraying frequency and the subsequent significant increase of natural enemies for the control of secondary pests. We would therefore expect declines in insecticide resistance levels. We analyzed patterns of resistance to insecticides used against cotton bollworm (CBW, Helicoverpa armigera) and cotton aphid (Aphis gossypii) in Australia and China in relation to landscape composition and pesticide applications. In both countries, insecticide resistance in H. armigera declined rapidly in the first 7-8 years of commercial Bt cotton farm -ing, but the trend then reversed with resistance levels either higher or the same as before Bt cotton was commercialized. The susceptibility of A. gossypii to insecticides differs between China and Australia. In China, the relatively high resistance levels in aphids did not decline after introducing Bt cotton and in fact increased. In contrast, there was no clear trend of declining resistance levels in A. gossypii after the adoption of Bt cotton in established cotton growing areas in Australia. We conclude that the resistance in H. armigera was influenced by sprays in crops other than cotton in diverse cropping landscapes; in A. gossypii, resistance was driven by the insecticide use patterns within traditional cotton growing regions. Our study implies that the principals of rational landscape level resistance management for both target and secondary pests should be adopted when commercializing Bt cotton, to better account for the compatibility of Bt crops with IPM outside and within cotton industries.

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