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1、褐飛虱降落機(jī)制的個例分析胡高I包云軒I王建強(qiáng)2翟保平/(1.南京農(nóng)業(yè)大學(xué)昆蟲學(xué)系，農(nóng)業(yè)部病蟲害監(jiān)測與治理垂點(diǎn)開放實(shí)驗(yàn)室，南京210095；2.全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心病蟲測報處，北京100026)摘要：應(yīng)用MM5小尺度數(shù)值模擬模式和GrADS氣象圖形軟件，對1999年6月22R?7月2H-次褐飛虱遷飛降落過程及其大氣背景場進(jìn)行了個例研究，并側(cè)重對靈川、東至、徽州三個站點(diǎn)的降蟲機(jī)制做了客觀分析。結(jié)果表明：(1)此次遷飛過程冇兩個明顯的降蟲區(qū)：天柱?靈川?賀縣一線范圍內(nèi)(降蟲區(qū)I)和三都■天柱■黔陽■修水■東至■徽州■奉賢一線(降蟲區(qū)II)；(
2、2)低空急流為褐飛虱北遷提供了運(yùn)載氣流，降蟲區(qū)位于降水區(qū)邊緣；(3)地形降水脅迫害蟲降落是降蟲區(qū)I褐￡虱降落的主要原因，梅雨鋒降水導(dǎo)致了褐飛虱集中降落在降蟲區(qū)II;(4)蟲源的空間分布差異和不同的天氣條件導(dǎo)致了東至、徽州地區(qū)不同的降蟲分布。關(guān)鍵詞：褐飛虱；降落；梅雨鋒；地形脅迫CaseStudiesontheLandingMechanismsoftheBrownPlanthoppersNilaparvataLugens(Stal)HUGao、BAOYun-Xuan,WangJian-qiang,ZHAIBao-Ping{X.KeyLabor
3、atoryofMonitoringandManagementofPlantDiseasesandInsectPests,theMinistryofAgriculture,NanjingAgriculturalUniversity,Nanjing210095,China.2.DivisionofPestForecasting,NATESC,Beijing100026,China)Abstract:Thelandingmechanismsofbrownplanthoppers,Nilaparvatalugens(Stal)(BPH)werest
4、udiedusingGIS(GeographicInformationSystem),MM5(TheFifth-GenerationMesoscaleModel)andGrADS(GridAnalysisandDisplaySystem)syntheticallytoanalyzegeographicdistributionpatternsofimmigratedpopulationsofBPHandtheatmosphericbackgroundsthatinfluencedthelandingprocesses.Duringthemom
5、entousrainfallprocessfromJune22toJuly2ini999,atypicalmigrationprocessofBPHoccurredinthesouthernChina.Thespatio-temporaldistributionsoftheimmigrationpeaksofBPHwereanalyzedusingthedataoflighttrapcatchesandfieldsurvey.Inaddition,wcanalyzedtheatmosphericbackgroundsduringtheBPH
6、immigration,i.e.9thewindbornstreams,thecirculationsituations,theweatherconditions,andthetopographiesinfluencedtheimmigrations,etc.ThelandingmechanismsofBPHatLingchuan,DongzhiandHuizhouwerecomparedbasedontopography,precipitation,subsidingairflowetc.Thecorrelationsbetweenthe
7、populationdensitiesofBPHatsourceareasandlandingareaswereanalyzedbyusingHYSPLIT,atrajectoryanalysissoftware?Weobtainedthefollowingresults:(1)BPHlandedobviouslyonthetwoareasinthestudiedcases:i.c.LandingareaIisalongTianzhu(GuizhouProvince),Lingchuan(GuangxiAutonomousRegion)an
8、dHexian(GuangxiAutonomousRegion);andLandingareaIIisalongSandu基金項(xiàng)目：國家973項(xiàng)目(2006CB102007),國
