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利用空气粒子扩散微机模型,对1979、1980年9、10月份上海到大连航海海捕稻纵卷叶螟的回迁途径和虫源地进行模拟分析。初步明确了两年89次捕蛾中的73次虫源地。虫源主要分布于28～42°N,117～128°E 的中朝两国的沿海稻区,深入内陆或远东日本的较少。秋季回迁稻纵卷叶螟的迁飞时间变异较大:在24小时内迁来的占45.21%,经24～48小时,48～72小时迁来的蛾子分别占28.77%和24.66%,只有1.37%的虫源需72小时以上才能完成到达海捕区域的迁飞。
The airborne particle diffusion model was used to simulate the retrograde approach and the origin of the trapped rice leafroller from Shanghai to Dalian Sea in September and October of 1979 and 1980. The initial clear 89 two-year moth in 73 times the source of insects. The source of insects mainly distributed in coastal rice areas of China and North Korea at 28-42 ° N and 117-128 ° E, with less inland or Far East Japan. In autumn, the migration time of C. medinalis varied greatly: 45.21% migrated within 24 hours, 28.77% and 24.66% migrated after 24-48 hours and 48-72 hours respectively, only 1.37 It takes more than 72% of the insect population to reach the sea catchment area for relocation.