Geographic variation in susceptibility of Chilo suppressalis (Lepidoptera : Pyralidae) to bacillus thuringiensis toxins in China

文献类型： 外文期刊

第一作者： Wu, KM

作者： Wu, KM;Gao, XW;Peng, YF;Guo, YY

作者机构：

关键词： Chilo suppressalis;Bacillus thuringiensis;susceptibility;China

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

ISSN： 0022-0493

年卷期： 2003 年 96 卷 6 期

页码：

收录情况： SCI

摘要： Geographic variation in the susceptibility of the striped stem borer, Chilo suppressalis (Walker) (Lepidoptera: Pyralidae), in China to Bacillus thuringiensis (Bt) insecticidal crystal proteins Cry1Ac and Cry1Ab was studied to establish baseline information for comparing the future response of populations with increased exposure to Bt products. Rice is the major host of C. suppressalis, and Bt rice may be released in China in the near future. Twelve populations of the pest were collected from the major rice-growing regions of China. LC50 estimates were determined for all populations for Cry1Ac and for eight populations for Cry1Ab. The bioassay results indicated that the range of LC50 in neonate larvae to Cry1Ac and Cry1Ab was from approximate to15 to approximate to157 mg (AI)/L and approximate to2 to approximate to34 mg (AI)/L, respectively. LC50 values were lower for Cry1Ab than for Cry1Ac, and there was a significant positive correlation between the two toxins tested.

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