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| Analysis on the migration of first-generation Mythimna separata (Walker) in China in 2013 |
ZHANG Zhi1, 2, ZHANG Yun-hui1, WANG Jian1, LIU Jie3, TANG Qing-bo4, LI Xiang-rui1, CHENG Deng-fa1, ZHU Xun1 |
1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
2 Beijing Plant Protection Station, Beijing 100029, P.R.China
3 National Agro-tech Extension and Service Centre, Beijing 100025, P.R.China
4 College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, P.R.China |
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Abstract Mythimna separata (Walker) is an important pest which can cause serious damages to cereal crops. In the past two decades, several heavy outbreaks have taken place in northern China. In order to develop a fine-scale method of forecasting outbreaks, population data were collected in northern China using searchlight traps and ground light traps. A background weather pattern analysis and trajectory analysis were performed via the Weather Research and Forecast (WRF) and FLEXPART models. Our results showed that heavy migration of first-generation M. separata appeared in northern China in 2013. In Yanqing District, Beijing, the cumulative number of captured adults in searchlight traps was around 250 000 and the daily maximum for trapped moths was 86 000. During the peak period, the majority of M. separata moths arrived after 00:00 every night. The sex ratio (female:male) at each monitoring site was greater than 1 and greatly fluctuated with population dynamics. During the migration peak, prevailing downdraft winds benefited M. separata moths to land passively. Trajectory simulation showed that immigrants were from Anhui, Jiangsu and Hubei provinces and most of them could continue to fly into the northeastern regions of China. These results provide technical support for fine-scale forecasting of the outbreak of M. separata at meso- and micro-scale.
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Received: 21 June 2017
Accepted:
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| Fund: This work was supported by the Special Fund for Agro-scientific Research in the Public Interest, China (201403031), the National Natural Science Foundation of China (31571998), the earmarked fund for China Agriculture Research System (CARS-03), and the National Key Research and Development Program of China (2016YFD0300702). |
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Corresponding Authors:
Correspondence ZHANG Yun-hui, Tel: +86-10-62815935, E-mail: yhzhang@ippcaas.cn
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Cite this article:
ZHANG Zhi, ZHANG Yun-hui, WANG Jian, LIU Jie, TANG Qing-bo, LI Xiang-rui, CHENG Deng-fa, ZHU Xun.
2018.
Analysis on the migration of first-generation Mythimna separata (Walker) in China in 2013. Journal of Integrative Agriculture, 17(07): 1527-1537.
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