Issue:ISSN 2095-1353
CN 11-6020/Q
Director:Chinese Academy of Sciences
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2013年50 No.3
Tracking the source regions of Cnaphalocrocis medinalis in the rice growing region of northern Guangdong Province
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Key Words：rice growing region of northern Guangdong Province, Cnaphalocrocis medinalis, trajectory analysis, insect source region
Abstract： The geographic distribution of the source and landing areas of Cnaphalocrocis medinalis (Guenée) were analyzed using GIS (Geographic Information System), HYSPLIT, a trajectory analysis software package for the simulation of migration pathways, and data from daily field surveys conducted between 2000 and 2011 in Qujiang plant protection stations. We obtained the following results: Most of the early immigrants of C. medinalis came from Hainan Province in May and southern Guangdong and Guangxi in June. Most of the summer emigrants of C. medinalis are predicted to land in the rice growing regions of the Yangtze River Delta and Anhui Province. Most of the autumn immigrants came from the rice growing region of Yangtze River Delta and southern Anhui Province, but also from southern Zhejiang Province and northern Fujian Province. The autumn emigrants are predicted to land in southern Hainan Province and northern Vietnam. The spatio-temporal distribution of the source regions of the early immigrants is predicted to shift northward gradually with the change of season, but otherwise there are no obvious seasonal differences between months. This study provides a preliminary spatiotemporal model of the south to north migration of C. medinalis in rice growing region of northern Guangdong Province.