[Effects of typhoon 'Haitang' airflow field on the northward migration route of rice brown planthopper].
Based on GIS, GrADS, and HYSPLIT-4.8 model, this paper analyzed the daily light-trap catches of rice brown planthopper at 42 pest monitoring stations of 10 provinces in China, the wind field on 850 hPa isobaric surface, and the migration tracks of rice brown planthopper at 20 pest monitoring stations during the occurrence of 0505 typhoon 'Haitang' from 19th to 21st July, 2005. After its landing on China, the typhoon 'Haitang' changed the southwest air flow, a flow which leads the northward migration of rice brown planthopper, and made the wind field converge in the southwest of the typhoon and swerve in larger areas. Accordingly, the northward migration of the rice brown planthopper was stopped, and the airborne populations were forced to descend in some areas. The shear line area nearby 850 hPa isobaric surface was the concentration and deposition area of the rice brown planthopper. There would be a mass migration area in the warm airflow shear area in the southeast of typhoon during the collapse of the typhoon. After the whole typhoon landed, the southwest airflow rebuilt, and a mass rice brown planthopper migrated to the north.
Wang
Cui-Hua
CH
Ministry of Agriculture Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Nanjing Agricultural University, Nanjing 210095, China. wch@njau.edu.cn
Zhai
Bao-Ping
BP
Bao
Yun-Xuan
YX
D000392:Air Movements; D025041:Animal Migration; D000818:Animals; D002681:China; D055867:Cyclonic Storms; D040362:Geographic Information Systems; D006430:Hemiptera / Q000502:physiology*; D012275:Oryza / Q000469:parasitology*