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Bt cotton producing Cry1Ac and Cry2Ab does not harm two parasitoids, Cotesia marginiventris and Copidosoma floridanum

文献类型： 外文期刊

作者： Tian, Jun-Ce 1 ; Wang, Xiang-Ping 1 ; Chen, Yang 4 ; Romeis, Jorg 5 ; Naranjo, Steven E. 6 ; Hellmich, Richard L. 7 ;

作者机构： 1.Cornell Univ, Dept Entomol, NYSAES, New York, NY 10021 USA

2.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Inst Plant Protect & Microbiol, Hangzhou, Zhejiang, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou, Hubei, Peoples R China

4.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, Key Lab Biotechnol Plant Protect MOA & Zhejiang P, Hangzhou, Zhejiang, Peoples R China

5.Agroscope, Res Div Agroecol & Environm, Zurich, Switzerland

6.USDA ARS, Arid Land Agr Res Ctr, Maricopa, AZ USA

7.Iowa State Univ, USDA ARS, Corn Insects & Crop Genet Res Unit, Ames, IA USA

8.Iowa State Univ, Dept Entomol, Ames, IA USA

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2018 年 8 卷

页码：

收录情况： SCI

摘要： Cabbage looper, Trichoplusia ni (Hubner) is an important lepidopteran pest on many vegetable and greenhouse crops, and some field crops. Although there are no commercial transgenic Bt vegetable or greenhouse crops, T. ni is a target of Bollgard II cotton, which produces Cry1Ac and Cry2Ab. We expand on previous work that examined the effect of Bt crops on parasitoids using Bt-resistant lepidopteran populations as hosts. Cry1Ac/Cry2Ab-resistant T. ni larvae were used to eliminate host quality effects and to evaluate the direct effects of Bt cotton on the parasitoids Copidosoma floridanum (Ashmead) and Cotesia marginiventris (Cresson). These tri-trophic studies confirm that Bt cotton had no significant impact on development, success of parasitism, survival and adult longevity of C. marginiventris when using Bt-resistant T. ni fed on Bt cotton. Similarly, this Bt cotton had no significant impact on the development, mummy weight and the number of progeny produced by C. floridanum. Our studies verified that lyophilized Bt crop tissue maintained its insecticidal bioactivity when incorporated into an artificial diet, demonstrating that hosts and parasitoids were exposed to active Cry proteins. The egg-larval parasitoid C. floridanum, or similar species that consume their entire host, should be considered useful surrogates in risk assessment of Bt crops to non-target arthropods.

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