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稻纵卷叶螟在我省稻区原为一般性害虫,为害不重,1963年以后在我省东南部东沟、庄河一带逐渐转为常发性害虫,1971年全省不少地区大发生,防治失时的地块一片白叶,严重影响稻谷产量。过去对这一害虫的中长期测报缺少办法,只能在虫子发生时突击防治,比较被动,因此,摸清此虫的发生规律,寻找中长期测报办法实为必要。害虫中长期测报的重要根据之一是越冬基数的多少,但稻纵卷叶螟在我省能否越冬和以何种虫态越冬尚不了解,为解决这个问题,我们在前几年进行了春秋季越冬调查。
Cnaphalocrocis medinalis in the rice province in our province was originally a common pest, not harmful, after 1963 in the southeastern province of Donggou, Zhuanghe gradually turned into a common pest in 1971 in many parts of the province large Occurrence, prevention and treatment of lost time a piece of white leaves, a serious impact on rice production. In the past, there was a lack of methods for mid-term and long-term measurement of this pest. It can only be used as a surprise attack and control when it occurs. Therefore, it is necessary to find out the regularity of this pest and find a medium and long term measure. Long-term pests reported one of the important basis for the number of overwintering base, but the rice leaf roller overwintering in our province and in what form of winter is not understood, in order to solve this problem, we conducted a few years ago Spring and autumn winter investigation.