According to the daily lighttrap catches of Xuyong, Sichuan Province from 1991 to 2012,we analyzed the trajectory simulation and meteorological background of immigration peaks of whitebacked planthoppers \[Sogatella furcifera (Horváth),WBPH\] by HYSPLIT 4.8(Hybrid SingleParticle Lagrangian Integrated Trajectory)and GRADS (Grid Analysis and Display System).The results showed that the main immigration times of WBPH in Xuyong, Sichuan Province were from May to July. The immigration peaks were few in May. The source areas were mainly located in the southwest of Yunnan, and the secondary source areas were at the central region of Yunnan, the north of Myanmar and Vietnam. From June to July, with The south airflow prevailing in Xuyong,the immigration times was increased. The mass immigration of WBPH into Xuyong during June was from the east and the south of Yunnan, and some immigrants from the northwest of Guangxi, the north of Myanmar, and the central part of Yunnan. In July, the northeast of Yunnan, the southwestern Guizhou and the border of YunnanGuizhou were the major source areas, and the secondary source areas were the central region of Yunnan and the northwest of Guangxi. Based on the analysis on the meteorological background and rainfall distribution, it was found that the rainfall, the vertical movement of airflow and the wind shear caused mass descent of WBPH into Xuyong.
BI Jianchun1， CHEN Xingliao1， PENG Xiaoming2， FENG Chuanhong3， MA Li3， JIANG Chunxian1,*， LI Qing1， WANG Haijian1， YANG Qunfang1
. Source Area and Landing Mechanism of Early Immigration Population of Whitebacked Planthoppers in Xuyong, Sichuan Province[J]. Chinese Journal OF Rice Science, 2014
, 28(5)
: 541
-550
.
DOI: 10.3969/j.issn.1001-7216.2014.05.012
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