2015年吉林省公主岭三代黏虫的虫源分析

为了揭示2015年吉林省公主岭三代黏虫的虫源, 为其预测预报及综合防控提供科学依据, 本文基于扫描昆虫雷达观测、常规监测、轨迹模拟及天气背景学分析等研究方法, 对吉林省公主岭三代黏虫的虫源来源进行了分析。结果表明:(1)因虫源基数及增殖倍数较高, 二代黏虫蛾种群数量较高; (2)二代黏虫蛾迁飞以不利其回迁的西南风、南风为主; (3)观测初期未见黏虫聚集成层迁飞的现象, 直至后期才见黏虫向西南方向迁飞; (4)气流和降雨是二代黏虫蛾未能有效回迁的主要原因, 三代黏虫发生的虫源, 是北迁的种群和本地种群共同繁殖的结果。

Analysis of the source of third-generation armyworm Mythimna separata (Walker) in Gongzhuling, Jilin Province in 2015

In order to determine the source of third-generation armyworm, Mythimna separata in Gongzhuling, Jilin Province in 2015, and to establish a basis for prediction and comprehensive control, the source of third-generation armyworm was investigated based on the observations by scanning entomological radar, routine monitoring, trajectory analysis and weather analysis. We obtained the following results: (1) Due to the population size and proliferation rate, the population number of second-generation armyworm was high; (2) the wind directions were basically southwest and south, so the second-generation armyworm was not able to return to southern China; (3) the aerial stratification was not observed until later period, and (4) due to airflow and rainfall, the second-generation armyworm did not form an effective emigration. The source of third-generation armyworm came from local and northward migrating populations.