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通过对第一代粘虫田間消长的系统調查、田間飼养和大面积普查等研究,証明辽宁省第二代粘虫的直接来源,主要并非为本地第一代粘虫后代的延續。結合标記粘虫回收的线索和对粘虫成虫飞翔力测定的結果,初步認为辽宁省中、南、北部地区內,自5月下旬—6月上旬田間突然出現的大量粘虫成虫,是从外省迁飞而来的;从6月中旬起本地第一代粘虫成虫开始羽化,才有部分本地虫源的成分。
Through systematic investigation on the population growth and development of the first generation Mythimna separata, field breeding and large-area census, the direct source of the second generation armyworm in Liaoning Province is not proved to be the continuation of the offspring of the first generation of local armyworm. Based on the results of the recovery of the markers of Mythimna separata and the determination of the flight force of the adults of Mythimna separata, it is preliminarily believed that a large number of adults of the armyworm in the field in the middle, south and north of Liaoning Province suddenly appeared from late May to early June, Migrating from other provinces; from mid-June onwards, the first generation of adult armyworm worms began to emerge and only part of the ingredients of local insect pests originated.