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褐飞虱是我地区晚稻上的严重害虫,对晚稻生产威胁极大。过去防治褐飞虱着重抓晚稻后期大暴发的五代。由于发生面积大,虫口密度高,虫卵重叠,加上水稻植株高大,害虫隐蔽,造成了防治上的被动局面。每年都遭受不同程度的损失。在总结历年经验教训的基础上,通过对晚稻上褐飞虱发生规律的分析,提出了狠压短翅型成虫的主要虫源——第四代若虫的防治策略。
Nilaparvata lugens is a serious pest on late rice in my area, threatening the late rice production. The Five Prevention and Control of Brown Planthopper in the past focused on the late outbreak of late rice. As a result of large area, insect population density, egg overlap, coupled with tall rice plants, insects hidden, resulting in the passive control of the situation. Suffer different degrees of loss each year. On the basis of summing up the experiences and lessons of the past years, we proposed the control strategy of the fourth generation nymphs, the main source of the short-winged adults, through the analysis of the occurrence of brown planthopper on late rice.