Effects of land use and insecticides on natural enemies of aphids in cotton: First evidence from smallholder agriculture in the North China Plain
文献类型：SCI/SSCI论文
| 作者 | Zhou K. ; Huang J. K. ; Deng X. Z. ; Van Der Werf W. ; Zhang W. ; Lu Y. H. ; Wu K. M. ; Wu F. |
| 发表日期 | 2014 |
| 关键词 | Landscape Insecticide use Natural enemies Ladybeetle Cotton Ecosystem services coccinella-septempunctata biocontrol services landscape diversity bt cotton coleoptera management pest biodiversity parasitism varieties |
| 英文摘要 | Studies conducted in the USA and Europe have shown that diverse landscapes in general support greater natural enemy abundance. No quantitative evidence on the relationship between land use diversity and natural enemies has been reported from developing countries, where fields and farms are much smaller than in modernized agriculture in the west, and where insecticide use is often high and indiscriminate. This paper examines the effects of land use and farmers' insecticide application on natural enemies of aphids in cotton production, based on a unique dataset that links household and cotton field surveys to a detailed assessment of land uses in the landscapes surrounding the cotton fields in the North China Plain (NCP), a major grain and cotton production region in China. Our results show that, in the NCP where farms are small and landscape is dominated by a few crops, Shannon or Simpson land use diversity index is not a good indicator for explaining the relationship between land use and densities of aphid natural enemies. Instead, the types and proportions of cropland habitat mattered. Landscapes with more maize and grassland have higher ladybeetle populations in cotton fields. Farmers' pest management practices such as the amount and timing of insecticide use significantly affect ladybeetle densities. These results imply that there is a need to recognize the potential positive role of cropland use in pest management and call for more judicious insecticide use strategies by smallholder farmers in the North China Plain. (C) 2013 Elsevier B.V. All rights reserved. |
| 出处 | Agriculture Ecosystems & Environment |
| 卷 | 183 |
| 页 | 176-184 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0167-8809 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29359]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Zhou K.,Huang J. K.,Deng X. Z.,et al. Effects of land use and insecticides on natural enemies of aphids in cotton: First evidence from smallholder agriculture in the North China Plain. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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