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Effectiveness in the field of Bt rice lines against target pests under various cultural regimes

文献类型： 外文期刊

作者： Yang, Yajun 1 ; Han, Hailiang 2 ; Xu, Hongxing 1 ; Zheng, Xusong 1 ; Tian, Junce 1 ; Wang, Guiyue 2 ; Lin, Yongjun 3 ; Lu 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Maize, Dongyang 322100, Peoples R China

3.Huazhong Agr Univ, State Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China

4.Huazhong Agr Univ, Natl Ctr Plant Gene Res, Wuhan 430

关键词： cultural practices;Cnaphalocrocis medinalis;Chilo suppressalis;Lepidoptera;Pyralidae;Crambidae;Oryza sativa;Poaceae;transgenic rice;insecticidal proteins

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：2.25； 五年影响因子：2.184 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： China has a long history of rice cultivation, incorporating several cultural practices known to influence damage by insect pests. Transgenic Bt rice expresses lepidopteran-specific insecticidal proteins that primarily target lepidopteran insect pests. However, the effectiveness of Bt rice against target insect pests under different cultural regimes has not been evaluated. In this study, the effectiveness of Bt rice lines against rice leaffolder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera: Pyralidae), and striped stem borer, Chilo suppressalis Walker (Lepidoptera: Crambidae), was evaluated under various transplanting densities, crop establishment methods, and planting times. The results showed that Bt rice lines (T2A-1 and T1C-19, containing Cry2A and Cry1C, respectively) could prevent damage by these target pests under a range of cultural practices. Injury by C.medinalis or C.suppressalis on rice did not differ with the rice lines under various transplanting densities. Direct-seeded non-Bt rice MH63 suffered heavier injury by C.medinalis and C.suppressalis than it did with transplanting, whereas injury to the two Bt rice lines did not differ with planting methods. Planting time significantly affected injury by C.medinalis or C.suppressalis on non-Bt rice, whereas injury to Bt rice lines did not differ with planting time. These results suggest that transplanting density, planting method, and planting time did not significantly affect the resistance of two Bt rice lines, due to their high insecticidal activity against target insects.

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