广东白背飞虱早期迁入种群的虫源地分析

（1广东省农业科学院植物保护研究所广州510640；2华南农业大学资源与环境学院广州510642；3封开县农作物病虫测报站封开526537）摘要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。关键词白背飞虱，早期迁入，虫源地，轨迹分析analysisofthesourceareasofearlyimmigrantwhitebackedplanthoppersogatellafurcifera(horváth)inguangdongprovincewangzheng1,2qiguojun1**lvlihua1huqian3yuanweixi3(1plantprotectionresearchinstitute,guangdongacademyofagriculturalsciences,guangzhou510640,china;2collegeofnaturalresourcesandenvironment,southchinaagriculturaluniversity,guangzhou510642,china;3pestforecastingstationsoffengkaicounty,fengkai526537,china）abstractinordertodeterminethesourceareaofearlyimmigrantwhitebackedplanthopperssogatellafurcifera(horváth)inguangdongprovince,andtoestablishabasisforregionalforecastingandsourcesuppression,thegeographicdistributionofthesourceareaofearlyimmigrantwbphwasanalyzedbygis(geographicinformationsystem),hysplit,atrajectoryanalysissoftwareforthesimulationofmigrationpathways,andlighttrapcatchdatafrom4plantprotectionstations(includingleizhou,zhaoqing,qujiangandmeixian).weobtainedthefollowingresults:(1)peaklighttrapcatchesofwbphoccurredduringthedoublecroppingseasonforearlyandlaterice,andpeaksofearlyimmigrantsweremainlyconcentratedinleizhoufromearlyapriltolatemay,andinzhaoqing,qujiangandmeixianfrommaytojune.(2)basedonlighttrapcatchdata,theimmigrationpeaksofwbphinqujiangandzhaoqingwereobviouslyhigherthaninleizhouandmeixian.(3)simulationsofmigrationtrajectoriesindicatedthatmostoftheearlyimmigrantscamefromcentralandnorthernvietnam,centralandsouthernlaos,hainanprovinceandsouthernguangdongandguangxi.thespatiotemporaldistributionofsourceareasshiftedgraduallynorthwardwiththeseason.keywordssogatellafurcifera,earlyimmigrat,insectsourcearea,trajectoryanalysis