Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China
Long-term changes in land use, climate, and agricultural technologies may affect pest severity and management. The influences of these major drivers can only be identified by analyzing long-term data. This study examines panel data on land use, adoption of genetically modified *Bacillus thuringiensi...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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National Academy of Sciences
2018
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| Online Access: | https://hdl.handle.net/10568/97544 |
| _version_ | 1855538100174848000 |
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| author | Zhang, Wei Lu, Yanhui Werf, Wopke van der Huang, Jikun Wu, Feng Zhou, Ke Deng, Xiangzheng Jiang, Yuying Wu, Kongming Rosegrant, Mark W. |
| author_browse | Deng, Xiangzheng Huang, Jikun Jiang, Yuying Lu, Yanhui Rosegrant, Mark W. Werf, Wopke van der Wu, Feng Wu, Kongming Zhang, Wei Zhou, Ke |
| author_facet | Zhang, Wei Lu, Yanhui Werf, Wopke van der Huang, Jikun Wu, Feng Zhou, Ke Deng, Xiangzheng Jiang, Yuying Wu, Kongming Rosegrant, Mark W. |
| author_sort | Zhang, Wei |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Long-term changes in land use, climate, and agricultural technologies may affect pest severity and management. The influences of these major drivers can only be identified by analyzing long-term data. This study examines panel data on land use, adoption of genetically modified *Bacillus thuringiensis* (Bt) insect-resistant cotton, weather, pest severity, and insecticide use on three major cotton pests for 51 counties in China during 1991--2015. Bt cotton had pervasive effects on the whole pest complex in cotton and its management. Adoption resulted in major reductions in insecticide use for bollworm control. The resulting restoration of aphid biological control decreased aphid severity. However, mirid bugs, which have few effective natural enemies in cotton, increased in severity with warming May and reduced insecticide spraying against bollworm. The effects of landscape on pest severity were pest specific. The severity of cotton aphid and mirid bugs decreased with higher land use diversity, but the severity of highly polyphagous cotton bollworm was unrelated to land use diversity. Shares of forest, water body, and unused land area were negatively associated with the severity of mirid bugs, whereas cotton bollworm responded positively to the shares of water body and unused land area. Farmers sprayed insecticides at mild infestation levels and responded aggressively to severe bollworm outbreaks. Findings support the usefulness of Bt-based plant resistance as a component of integrated pest management (IPM) but highlight the potential for unexpected outcomes resulting from agro-ecosystem feedback loops as well as the importance of climate. |
| format | Journal Article |
| id | CGSpace97544 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | National Academy of Sciences |
| publisherStr | National Academy of Sciences |
| record_format | dspace |
| spelling | CGSpace975442025-12-08T10:11:39Z Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China Zhang, Wei Lu, Yanhui Werf, Wopke van der Huang, Jikun Wu, Feng Zhou, Ke Deng, Xiangzheng Jiang, Yuying Wu, Kongming Rosegrant, Mark W. bt-cotton climate change insecticide use land use diversity integrated pest management agricultural technology cotton capacity development agriculture land use weather genetically modified organisms insecticides pest insects Long-term changes in land use, climate, and agricultural technologies may affect pest severity and management. The influences of these major drivers can only be identified by analyzing long-term data. This study examines panel data on land use, adoption of genetically modified *Bacillus thuringiensis* (Bt) insect-resistant cotton, weather, pest severity, and insecticide use on three major cotton pests for 51 counties in China during 1991--2015. Bt cotton had pervasive effects on the whole pest complex in cotton and its management. Adoption resulted in major reductions in insecticide use for bollworm control. The resulting restoration of aphid biological control decreased aphid severity. However, mirid bugs, which have few effective natural enemies in cotton, increased in severity with warming May and reduced insecticide spraying against bollworm. The effects of landscape on pest severity were pest specific. The severity of cotton aphid and mirid bugs decreased with higher land use diversity, but the severity of highly polyphagous cotton bollworm was unrelated to land use diversity. Shares of forest, water body, and unused land area were negatively associated with the severity of mirid bugs, whereas cotton bollworm responded positively to the shares of water body and unused land area. Farmers sprayed insecticides at mild infestation levels and responded aggressively to severe bollworm outbreaks. Findings support the usefulness of Bt-based plant resistance as a component of integrated pest management (IPM) but highlight the potential for unexpected outcomes resulting from agro-ecosystem feedback loops as well as the importance of climate. 2018 2018-09-28T12:24:53Z 2018-09-28T12:24:53Z Journal Article https://hdl.handle.net/10568/97544 en Open Access application/pdf National Academy of Sciences Zhang, Wei; Lu, Yanhui; van der Werf, Wopke; Huang, Jikun; Wu, Feng; Zhou, Ke; Deng, Xiangzheng; Jiang, Yuying; Wu, Kongming; Rosegrant, Mark W. 2018. Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China. 10p |
| spellingShingle | bt-cotton climate change insecticide use land use diversity integrated pest management agricultural technology cotton capacity development agriculture land use weather genetically modified organisms insecticides pest insects Zhang, Wei Lu, Yanhui Werf, Wopke van der Huang, Jikun Wu, Feng Zhou, Ke Deng, Xiangzheng Jiang, Yuying Wu, Kongming Rosegrant, Mark W. Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title | Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title_full | Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title_fullStr | Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title_full_unstemmed | Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title_short | Multidecadal, county-level analysis of the effects of land use, Bt cotton, and weather on cotton pests in China |
| title_sort | multidecadal county level analysis of the effects of land use bt cotton and weather on cotton pests in china |
| topic | bt-cotton climate change insecticide use land use diversity integrated pest management agricultural technology cotton capacity development agriculture land use weather genetically modified organisms insecticides pest insects |
| url | https://hdl.handle.net/10568/97544 |
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