褐飞虱的降落机制  

Case studies on the landing mechanisms of the brown planthoppers Nilaparvata lugens(Stl)

作　　者：胡高[1] 包云轩[1] 王建强[2] 翟保平[1] 

机构地区：[1]南京农业大学昆虫学系农业部病虫害监测与治理重点开放实验室,南京210095 [2]全国农业技术推广服务中心病虫测报处,北京100026

出　　处：《生态学报》2007年第12期5068-5075,共8页Acta Ecologica Sinica

基　　金：国家973资助项目(2006CB102007);国家"十一.五"科技支撑计划资助项目(2006BAD08A01);国家自然科学基金项目(30671340)~~

摘　　要：应用MM5中尺度数值模拟模式和GrADS气象图形软件,对1999年6月22日～7月2日一次褐飞虱迁飞降落过程及其大气背景场进行了个例研究,并侧重对灵川、东至、徽州3个站点的降虫机制做了分析。结果表明:(1)此次迁飞过程有两个明显的降虫区:天柱-灵川-贺县一线范围内(降虫区Ⅰ)和三都-天柱-黔阳-修水-东至-徽州-奉贤一线(降虫区Ⅱ);(2)低空急流为褐飞虱北迁提供了运载气流,降虫区位于降水区边缘;(3)地形降水胁迫害虫降落是降虫区Ⅰ褐飞虱降落的主要原因,梅雨锋降水导致了褐飞虱集中降落在降虫区Ⅱ;(4)虫源的空间分布差异和不同的天气条件导致了东至、徽州地区不同的降虫分布。The landing mechanisms of brown planthoppers, Nilaparvata lugens （Stal） （BPH） were studied using GIS （Geographic Information System）, MM5 （The Fifth-Generation Mesoscale Model）and GRADS （Grid Analysis and Display System） synthetically to analyze geographic distribution patterns of immigrated populations of BPH and the atmospheric backgrounds that influenced the landing processes. During the momentous rainfall process from June 22 to July 2 in1999, a typical migration process of BPH occurred in the southern China. The spatio-temporal distributions of the immigration peaks of BPH were analyzed using the data of light trap catches and field survey. In addition, we analyzed the atmospheric backgrounds during the BPH immigration, i. e. , the windborn streams, the circulation situations, the weather conditions, and the topographies influenced the immigrations, etc. The landing mechanisms of BPH at Lingchuan, Dongzhi and Huizhou were compared based on topography, precipitation, subsiding airflow etc. The correlations between the population densities of BPH at source areas and landing areas were analyzed by using HYSPLIT, a trajectory analysis software. We obtained the following results ： （ 1 ） BPH landed obviously on the two areas in the studied cases ： i.e. Landing area Ⅰ is along Tianzhu （ Guizhou Province ） , Lingchuan （ Guangxi Autonomous Region ） and Hexian （ Guangxi Autonomous Region）; and Landing area Ⅱ is along Sandu （Guizhou Province ）, Tianzhu （Guizhou Province ）, Qianyang （Hunan Province ）, Xiushui （ Jiangxi Province）, Dongzhi （ Anhui Province）, Huizhou （ Anhui Province） and Fengxian （ Shanghai City）. （2） The airstream of the low lever jet carried BPH migrating to the north. （3） The landing areas are mainly on the margin of the rainfall zone, at which the precipitation changed from slight to heavy. （4） The orographic precipitation forced massive BPH to immigrate into the landing area Ⅰ. （5） Whereas, the Bai-u front lead

关 键 词：褐飞虱 降落 梅雨锋 地形胁迫 

分 类 号：S433[农业科学—农业昆虫与害虫防治]