Chinese Journal of Agrometeorology ›› 2015, Vol. 36 ›› Issue (01): 74-82.doi: 10.3969/j.issn.1000-6362.2015.01.010

• 论文 • Previous Articles     Next Articles

Analysis on Occurrence Pattern and Migratory Paths of Brown Plant hopper in Guangxi Province

TANG Guang tian,BAO Yun xuan   

  1. 1.Jiangsu Key Laboratory of Agricultural Meteorology,Nanjing University of Information Science & Technology,Nanjing210044,China;2.Guilin Meteorological Bureau,Guilin541001
  • Received:2014-08-16 Online:2015-02-20 Published:2015-05-21

Abstract: Based on the lighting trap catches of brown plant hopper (BPH),Nilaparvata lugens (Stl) data from 5 plant protection stations at Longzhou,Yulin,Laibin,Yongfu and Xingan in the Guangxi Zhuang Autonomous Region during 1991-2012,the BPH occurrence pattern was summarized.The BPH backward trajeclories on peak days was simulated by HYSPLIT and the primary BPH migration paths into Guangxi were analyzed.The results showed that the BPH immigration beginning date and the first immigration peak date from 5 stations were advanced,with the rates of 1.1d·10y-1 and 1.8d·10y-1 respectively in average.But the immigration ending date was postponed, with the rate of 2.6d·10y-1 in average. The southerly path (including the southwest path,the south path and southeast path) was the main path of BPH immigration in spring and summer,and it accounted for more than 94% of the total immigration events.The Indochina Peninsula,Hainan Island and Guangdong Province were the main pest sources of BPH.The back immigration path of BPH in autumn was mainly northeast path,which accounted for 89% of the total immigration events.The main pest sources of BPH immigration in autumn were Jiangxi Province,Hunan Province and Guangdong Province.BPH immigration occurred seriously when the south airflow took the dominant place at 850hPa in July,but BPH immigration decreased remarkable when the north airflow prevailed.Accordingly,when there was the prevailing north airflow at 925hPa in September,it was advantageous to the immigration southward of BPH population into the Guangxi from Jiangxi,Hunan and the other provinces in the north side. Conversely,BPH landing heads reduced obviously when the south airflow prevailed at this level.

Key words: Brown plant hopper (BPH) Nilaparvata lugens(Stl), Immigration beginning date, Immigration peak date, Immigration ending date, Immigration path, Simulation of backward trajectory