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以控制和影响褐飞虱Nilaparvatalugens(St l)迁飞过程的生理生态参数为依据 ,应用时空分辨率较高的中尺度数值预报模式—MM4和三维轨迹计算方法对我国盛夏褐飞虱的北迁过程进行了动态模拟。模拟结果及其与实测虫情资料的对比研究表明 :(1)我国盛夏褐飞虱北迁的虫源地主要在 2 2 5°N～ 2 7°N ,110°E～ 116°E之间。 (2 )空中迁飞路径有三条 :主径取 32°方位角 ,副径分别取 10°和 75°方位角。 (3)降落虫汇区有三个 :主降区为长江中下游稻区 ,副降区分别为鄂西北、川东北稻区和浙东南、闽北稻区。 (4)理论模拟与实际虫情普查分析比较吻合 ,说明该模型可作为迁飞害虫灾变机制研究的一个重要工具
In order to control and influence the ecophysiological parameters of the Nilaparvatalugens (St l) migration during the midsummer, the mesoscale numerical prediction model-MM4 and three-dimensional trajectory calculation method was used to conduct a dynamic simulation. The results of the simulation and comparison with the measured worm data show that: (1) The main source of brown planthopper migratory in the midsummer of China is between 225 ° N ~ 27 ° N and 110 ° E ~ 116 ° E. (2) There are three airborne flight paths: the main path takes 32 ° azimuth, and the 10 ° and 75 ° azimuths respectively. (3) There are three landing worm zone: the main drop zone is the middle and lower reaches of the Yangtze River rice area, sub-drop area are northwest Hubei Province, northeastern Sichuan rice and southeast Zhejiang Province, northern Fujian rice. (4) The theoretical simulation is in good agreement with the actual census analysis, indicating that the model can be used as an important tool for the study of catastrophe mechanism of migratory pests