广东白背飞虱早期迁入种群的虫源地分析

Analysis of the source areas of early immigrant white-backed planthopper Sogatella furcifera(Horváth) in Guangdong Province

为了揭示广东省白背飞虱早期迁入的虫源地分布,为其精细化预测预报及源头治理提供科学依据,根据广东省雷州、肇庆、曲江、梅县4个地区的白背飞虱虫情资料,利用HYSPLIT轨迹分析平台和GIS进行早期迁入峰的轨迹分析,结果表明:(1)广东白背飞虱的迁入在早稻和晚稻上各出现一段灯诱高峰,雷州出现的灯诱高峰最早,集中在4月上旬—5月下旬,其他地区集中在5—6月;(2)曲江、肇庆的白背飞虱灯诱高峰日数明显高于雷州、梅县;(3)广东白背飞虱早期迁入的虫源地主要分布在越南中北部、老挝中南部、海南以及两广南部稻区。但其虫源地的时空分布存在季节性的差异,随着时间的推移,虫源地的分布逐渐由南向北偏移。

In order to determine the source area of early immigrant white-backed planthoppers Sogatella furcifera（Horváth） in Guangdong Province,and to establish a basis for regional forecasting and source suppression,the geographic distribution of the source area of early immigrant WBPH was analyzed by GIS（Geographic Information System）,HYSPLIT,a trajectory analysis software for the simulation of migration pathways,and light trap catch data from 4 plant protection stations（including Leizhou,Zhaoqing,Qujiang and Meixian）.We obtained the following results：（1） Peak light-trap catches of WBPH occurred during the double-cropping season for early and late-rice,and peaks of early immigrants were mainly concentrated in Leizhou from early April to late May,and in Zhaoqing,Qujiang and Meixian from May to June.（2） Based on light-trap catch data,the immigration peaks of WBPH in Qujiang and Zhaoqing were obviously higher than in Leizhou and Meixian.（3） Simulations of migration trajectories indicated that most of the early immigrants came from central and northern Vietnam,central and southern Laos,Hainan Province and southern Guangdong and Guangxi.The spatio-temporal distribution of source areas shifted gradually northward with the season.