我县地处黄淮平原中部,是稻麦两熟制为主的北方稻区,以单季中稻为主。随着耕作制度的变动,品种的更换以及有机合成农药不合理的大量使用,对害虫天敌的严重的杀伤作用,而使水稻害虫的发生为害程度加重。近年来,我县水稻上常发生的有两大害虫:水稻生长前期(分蘖到拔节幼穗分化期)是二、三代稻纵卷叶螟,水稻生长后期(抽 My county is located in the central part of the Huanghuai Plain, rice and wheat are mainly two northern rice growing areas, with a single season of rice-based. With the tillage system changes, the variety of replacement and unreasonable use of organic synthetic pesticides in large numbers, the pest natural enemies of the serious killing effect, leaving the pests of rice damage worse. In recent years, there are two pests that occur on paddy rice in our county: the first and second generation of rice leafroller, the late rice growth stage (pumping