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阜阳地区为粘虫一代多发区,主要以第一代幼虫在5月份为害麦类,大发生年份,除将麦叶吃光外,并成羣迁移为害高粱、玉米幼苗,给农业生产带来巨大损失。但是,在小发生年,幼虫密度很稀,对作物产量影响不大。是什么因素影响粘虫发生的多少呢?这的确是值得探讨的问题之一。粘虫能否在我区越冬?目前仍是疑问。由于大发生的虫源没有弄清,大大阻碍了粘虫予测予报工作的进一步发展。现根据近几年调查结果,对上述两个问题,提出初步看法,与大家共同讨论。
Fuyang area is a generation of armyworm-prone areas, mainly in the first generation of larvae harm wheat in May, the year of occurrence, in addition to the wheat leaves eaten, and groups of migrant damage sorghum, corn seedlings, to agricultural production has brought tremendous loss. However, larvae are sparsely populated at small births and have little effect on crop yields. What factors affect the occurrence of armyworms how much it? This is indeed one of the issues worth exploring. Mythimna separata can overwinter in my area? Is still doubt. Because of the large insect source did not find out, greatly hindered the development of armyworms to be reported to the newspaper. According to the findings of the past few years, we have put forward preliminary views on the above two issues and discussed with them all.