Fipronil resistance in the whitebacked planthopper (Sogatella furcifera): possible resistance mechanisms and cross-resistance
文献类型: 外文期刊
第一作者: Li, Jian
作者: Li, Jian;Shao, Ying;Liu, Zewen;Tang, Jian;Yang, Baojun
作者机构:
关键词: Sogatella furcifera;fipronil;resistance mechanism;cross-resistance
期刊名称:PEST MANAGEMENT SCIENCE ( 影响因子:4.845; 五年影响因子:4.674 )
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收录情况: SCI
摘要: BACKGROUND: The whitebacked planthopper (WBPH), Sogatella furcifera (Horvath), is a major rice pest in many parts of Asia. Fipronil has been widely used to control rice pests, and resistance to fipronil has been reported in some important species. RESULTS: A field population (F)of WBPH was collected, with 50.5-fold resistance to fipronil, which increased to 137.5-fold (F-se) after continuous selection for 11 generations. The F-se population did not show significant cross-resistance to the insecticides examined by comparison with the F population. TPP (synergism ratio 1.9), DEM (1.5) and PBO (1.1) showed only slight synergism on fipronil in the F-se population. A large increase was found in esterase and P450 monooxygenase activity in the F-se population. In vitro, PBO inhibited both esterase and P450 monooxygenase activity, and TPP inhibited esterase activity in the F-se population. CONCLUSION: Synergistic study in vivo and biochemical study in vitro indicated that esterase and P450 monooxygenases might be important factors for fipronil resistance in the selected population F-se. However, these biochemical factors could not lead to such high resistance (137.5-fold) in the F-se population, and target-site insensitivity would be another or more important factor.
分类号: S4
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