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Bacillus thuringiensis plants expressing Cry1Ac, Cry2Ab and Cry1F are not toxic to the assassin bug, Zelus renardii

文献类型: 外文期刊

作者: Su, H. -H. 1 ; Tian, J. -C. 1 ; Naranjo, S. E. 4 ; Romeis, J. 5 ; Hellmich, R. L. 6 ; Shelton, A. M. 1 ;

作者机构: 1.Cornell Univ, New York State Agr Expt Stn, Dept Entomol, Geneva, NY 14456 USA

2.Yangzhou Univ, Sch Hort & Plant Protect, Yangzhou, Peoples R China

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

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

5.Inst Sustainabil Sci ISS, Zurich, Switzerland

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

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

关键词: Spodoptera frugiperda;Trichoplusia ni;biological control;cotton;maize;risk assessment

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

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Cotton- and maize-producing insecticidal crystal (Cry) proteins from the bacterium, Bacillus thuringiensis (Bt), have been commercialized since 1996. Bt plants are subjected to environmental risk assessments for non-target organisms, including natural enemies that suppress pest populations. Here, we used Cry1F-resistant Spodoptera frugiperda (J.E. Smith) and Cry1Ac and Cry2Ab-resistant Trichoplusia ni (Hubner) as prey for the assassin bug, Zelus renardii (Kolenati), a common predator in maize and cotton fields. In tritrophic studies, we assessed several fitness parameters of Z.renardii when it fed on resistant S.frugiperda that had fed on Bt maize expressing Cry1F or on resistant T.ni that had fed on Bt cotton expressing Cry1Ac and Cry2Ab. Survival, nymphal duration, adult weight, adult longevity and female fecundity of Z.renardii were not different when they were fed resistant-prey larvae (S.frugiperda or T.ni) reared on either a Bt crop or respective non-Bt crops. ELISA tests demonstrated that the Cry proteins were present in the plant at the highest levels, at lower levels in the prey and at the lowest levels in the predator. While Z.renardii was exposed to Cry1F and Cry1Ac and Cry2Ab when it fed on hosts that consumed Bt-transgenic plants, the proteins did not affect important fitness parameters in this common and important predator.

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