Chlorantraniliprole resistance and its biochemical and new molecular target mechanisms in laboratory and field strains of Chilo suppressalis (Walker)

文献类型： 外文期刊

第一作者： Sun, Yang

作者： Sun, Yang;Chen, Qiong;Qin, Wenjing;Huang, Shuijin;Jiang, Ying;Qin, Houguo;Xu, Lu

作者机构：

关键词： Chilo suppressalis; chlorantraniliprole; biochemical mechanism; ryanodine receptor; mutation; mRNA expression

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： 2018 年 74 卷 6 期

页码：

收录情况： SCI

摘要： BACKGROUNDThe rice striped stem borer (SSB), Chilo suppressalis (Walker), is one of the most economically important and destructive rice pests in China. To date, the efficiency of conventional insecticides has decreased greatly because of the development of high resistance. Since the introduction of chlorantraniliprole in 2008, SSB has presented resistance issues. RESULTSIn this study, laboratory resistant strains R1 and R2 [resistance ratio (RR) of 38.8 and 110.4, respectively] were established and a field population HR (RR of 249.6) was collected. Synergist assessment and enzyme activity data suggested the potential involvement of P450s and esterases in the resistance mechanism. No target (ryanodine receptor, RyR) mutation was found in R1, but a novel mutation Y4667D was found in R2. At the same position of RyR in HR strain, Y4667D and Y4667C were observed at low frequencies. In addition, the conserved mutation I4758M was found with a frequency of 94.4%. RyR mRNA expression was significantly lower in R1, R2 and HR than in S. When treated with chlorantraniliprole, RyR mRNA expression in all four strains was downregulated to approximate to 50%. CONCLUSIONSA comprehensive analysis, including biochemical, target mutations and target mRNA expression, was conducted in an attempt to interpret the chlorantraniliprole resistance mechanism in both laboratory and field SSB strains. (c) 2017 Society of Chemical Industry

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