Bt cotton area contraction drives regional pest resurgence, crop loss, and pesticide use

文献类型： 外文期刊

第一作者： Lu, Yanhui

作者： Lu, Yanhui;Wyckhuys, Kris A. G.;Yang, Long;Liu, Bing;Wu, Kongming;Zeng, Juan;Jiang, Yuying;Desneux, Nicolas;Zhang, Wei

作者机构：

关键词： biotechnology; environmental health; agrochemical pollution; sustainable intensification

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

ISSN： 1467-7644

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收录情况： SCI

摘要： Genetically-modified crops expressing Bacillus thuringiensis (Bt) proteins have been widely cultivated, permitting an effective non-chemical control of major agricultural pests. While their establishment can enable an area-wide suppression of polyphagous herbivores, no information is available on the impact of Bt crop abandonment in entire landscape matrices. Here, we detail a resurgence of the cosmopolitan bollworm Helicoverpa armigera following a contraction of Bt cotton area in dynamic agro-landscapes over 2007-2019 in North China Plain. An 80% reduction in Bt cotton was mirrored in a 1.9-fold increase of ambient H. armigera population levels, culminating in 1.5-2.1-fold higher yield loss and a 2.0-4.4-fold increase in pesticide use frequency in non-Bt crops (i.e. maize, peanut, soybean). Our work unveils the fate of herbivorous insect populations following a progressive dis-use of insecticidal crop cultivars, and hints at how tactically deployed Bt crops could be paired with agro-ecological measures to mitigate the environmental footprint of crop production.

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