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首页> 外文期刊>Journal of Economic Entomology >Susceptibility and selectivity of cnaphalocrocis medinalis (Lepidoptera: Pyralidae) to different cry toxins
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Susceptibility and selectivity of cnaphalocrocis medinalis (Lepidoptera: Pyralidae) to different cry toxins

机译：稻纵卷叶to对鳞翅目昆虫的敏感性和选择性

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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.
机译：在实验室中评估了四种Cry毒素（Cry1Ac，Cry1Aa，Cry1Ab和Cry1C）对从中国浙江省嘉兴市稻田收集的稻纵卷叶（（鳞翅目：Pyralidae）的有效性。生物测定法显示，C。medinalis对四种Cry毒素的敏感性不同。 Cry1Ac，Cry1Ab，Cry1Aa和Cry1C对C. medinalis的LC50值分别为0.405、1.111、1.939和1.246μg/ ml。此外，C。medinalis对不同Cry毒素的死亡率随时间推移显示出不同的结果，Cry1Ac，Cry1Ab，Cry1Aa和Cry1C对C. medinalis的LT50值分别为1.5、2.3、1.6和2.2 d。幼虫对Cry毒素的偏爱表明，与不含Bt毒素的叶片相比，没有苏云金芽孢杆菌（Bacillales：Bacillaceae; [Bt]）毒素的叶片上的C. medinalis幼虫没有明显的取食偏好。然而，不同的Cry毒素对C. medinalis幼虫具有不同的吸引力。在侵染后的8小时内，C。medinalis幼虫比Cry1Ac或Cry1C的叶片更喜欢Cry1Ab（22.4-27.6％）的叶片。

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