Monitoring of resistance for the diamondback moth to Bacillus thuringiensis Cry1Ac and Cry1Ba toxins and a Bt commercial formulation

文献类型： 外文期刊

第一作者： Li, X.-F.

作者： Li, X.-F.;Zhang, J.;Zhao, J.-Z.;Wu, Q.-J.;Xu, B.;Zhang, Y.-J.

作者机构：

关键词： Bacillus thuringiensis;Cry toxins;diamondback moth;Pluttella xylostella;susceptibility

期刊名称：JOURNAL OF APPLIED ENTOMOLOGY （ 影响因子：2.603； 五年影响因子：2.562 ）

ISSN： 0931-2048

年卷期： 2007 年 131 卷 7 期

页码：

收录情况： SCI

摘要： To monitor the resistance of field populations of the diamondback moth Plutella xylostella in China to the insecticidal protein CrylAc, CrylBa and commercial formulation Bacillus thuringiensis var. kurstaki (Btk), six representative populations of the diamondback moth were collected from Shanghai, Shandong, Hubei, Hunan, Zhejiang and Guangdong provinces of China where crucifer crop plants are intensively planted. Bioassay results showed that the populations of the diamondback moth from different locations exhibited different levels of resistance, compared with a susceptible laboratory population. The Guangdong field population was 56.15- and 21.90-fold resistant to CrylAc and Btk, respectively. Shanghai, Hunan, Shandong and Zhejiang populations were 37.85-, 17.24-, 10.24- and 9.41-fold resistant to CrylAc, respectively, but were not resistant to Btk. The Hubei population did not show resistance to CrylAc and Btk. Almost all tested populations were susceptible to CrylBa, but the Guangdong population showed soiric tolerance to CrylBa with a LC50 of 0.69 mu g/ml which was 6.17-fold higher than that of the susceptible population. The results suggested that the complex resistance patterns of field populations of P. xylostella need to be considered for expression of Bt toxin genes in genetically-engineered crop plants and commercial formulations.

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