Widespread adoption of Bt cotton and insecticide decrease promotes biocontrol services

文献类型： 外文期刊

第一作者： Wu, Kongming

作者： Wu, Kongming;Guo, Yuyuan;Jiang, Yuying;Desneux, Nicolas

作者机构：

期刊名称：NATURE （ 影响因子：49.962； 五年影响因子：54.637 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Over the past 16 years, vast plantings of transgenic crops producing insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) have helped to control several major insect pests~(1-5) and reduce the need for insecticide sprays~(1,5,6). Because broad-spectrum insecticides kill arthropod natural enemies that provide biological control of pests, the decrease in use of insecticide sprays associated with Bt crops could enhance biocontrol services~(7-12). However, this hypothesis has not been tested in terms of long-term landscape-level impacts~(10). On the basis of data from 1990 to 2010 at 36 sites in six provinces of northern China, we show here a marked increase in abundance of three types of generalist arthropod predators (ladybirds, lacewings and spiders) and a decreased abundance of aphid pests associated with widespread adoption of Bt cotton and reduced insecticide sprays in this crop. We also found evidence that the predators might provide additional biocontrol services spilling over from Bt cotton fields onto neighbouring crops (maize, peanut and soybean). Our work extends results from general studies evaluating ecological effects of Bt crops~(1-4,6,12,13) by demonstrating that such crops can promote biocontrol services in agricultural landscapes.

分类号： N

  • 相关文献
作者其他论文 更多>>

微信小程序