Susceptibility and selectivity of cnaphalocrocis medinalis (Lepidoptera: Pyralidae) to different cry toxins

文献类型: 外文期刊

第一作者: Yang, Yajun

作者: Yang, Yajun;Xu, Hongxing;Zheng, Xusong;Lu, Zhongxian

作者机构:

关键词: Bacillus thuringiensis;Cnaphalocrocis medinalis;Cry toxin;selectivity;susceptibility

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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年卷期:

页码:

收录情况: SCI

摘要: Effectiveness of four Cry toxins (Cry1Ac, Cry1Aa, Cry1Ab, and Cry1C) on Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae), collected from paddy fields in Jiaxing, Zhejiang Province, China, was evaluated in the laboratory. Bioassays showed that C. medinalis had different susceptibilities against four Cry toxins. The LC50 values of Cry1Ac, Cry1Ab, Cry1Aa, and Cry1C against C. medinalis were 0.405, 1.111, 1.939, and 1.246 μg/ml, respectively. Furthermore, the mortality of C. medinalis against different Cry toxins showed different results over time and LT50 values of Cry1Ac, Cry1Ab, Cry1Aa, and Cry1C against C. medinalis were 1.5, 2.3, 1.6, and 2.2 d, respectively. Preference of the larvae to Cry toxins revealed that C. medinalis larvae had no significant feeding preference on leaves without Bacillus thuringiensis (Bacillales: Bacillaceae; [Bt]) toxin compared with those containing Bt toxin. However, different Cry toxins had different attractive abilities to C. medinalis larvae. During 8 h after infestation, C. medinalis larvae preferred the leaves with Cry1Ab (22.4-27.6%) over those with Cry1Ac or Cry1C.

分类号: Q969.9

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