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

文献类型： 外文期刊

作者： Lu, Yanhui 1 ; Wyckhuys, Kris A. G. 1 ; Yang, Long 1 ; Liu, Bing 1 ; Zeng, Juan 2 ; Jiang, Yuying 2 ; Desneux, Nicolas 3 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pest, Beijing, Peoples R China

2.Natl Agrotech Extens & Serv Ctr, Beijing, Peoples R China

3.Univ Cote dAzur, INRAE, CNRS, UMR ISA, Nice, France

4.Int Food Policy Res Inst, Environm & Prod Technol Div, Washington, DC 20036 USA

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

年卷期：

页码：

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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