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Differential fipronil susceptibility and metabolism in two rice stem borers from China

文献类型： 外文期刊

作者： Fang, Qi 1 ; Huang, Cheng-Hua 2 ; Ye, Gong-Yin 1 ; Yao, Hong-Wei 1 ; Cheng, Jia-An 1 ; Akhtar, Zunnu-Raen 1 ;

作者机构： 1.Zhejiang Univ, State Key Lab Rice Biol, Inst Insect Sci, Hangzhou 310029, Zhejiang, Peoples R China

2.Chinese Acad Agr Sci, Guangxi Sugarcane Res Inst, Sugarcane Res Ctr, Nangning 530007, Peoples R China

关键词： Chilo suppressalis;Sesamia inferens;fipronil;susceptibility;metabolism;EUROPEAN CORN-BORER;ACTIVATED CHLORIDE CHANNELS;CHILO-SUPPRESSALIS WALKER;SULFONE METABOLITE;RESISTANCE MECHANISMS;ROOTWORM COLEOPTERA;OSTRINIA-NUBILALIS;COCKROACH NEURONS;DIAMONDBACK MOTH;TOXICITY

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

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收录情况： SCI

摘要： The susceptibilities of larvae of two rice Stern borers, namely, Chilo suppressalis (Walker) (Lepidoptera: Crambidae) and Sesamia inferens (Walker) (Lepidoptera: Nocutidae) to fipronil and its metabolites were. investigated, and then the activities of microsomal O-demethylase, and glutathione transferase (GST) ill two species were measured. The metabolism of fipronil in both stem borers was determined in vivo and in vitro. The LD50 value of fipronil to S. inferens was 118.5-fold higher than that of C. suppressalis. The bioassay results of fipronil metabolites showed that the toxicities of sulfone and sulfide were higher than fipronil for both species,and the differential toxicity between sulfone and fipronil was remarkable. Alternatively, the activities of microsomal O-demethylase and CST of C. suppressalis were 1.35- and 2.06-fold higher than S. inferens, respectively. The in vivo and in vitro Studies oil metabolism of fipronil showed that all of fipronil, sulfone, and sulfide were detected and the content of sulfone was higher than sulfide ill both stem borers. The residue of sulfone ill C. suppressalis was Significantly higher than that ill S. inferens. These results suggest that the higher activity of mixed function oxidases may cause the higher capacity of C. suppressalis to produce fipronil-sulfone, which is more toxic than fipronil leading to the higher susceptibility of this species.

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