稻纵卷叶螟是我省水稻的主要害虫之一,以2代、4代发生多,分别对早稻和晚稻危害严重。防治稻纵卷叶螟应在巧字上做文章,既能有的放矢,提高防效,又可节省农药,保护天敌。 看天气巧用药 有的年份稻纵卷叶螟大发生时,恰遇长期阴雨。调查中发现:晚稻分蘖阶段50％～70％的幼虫,躲在心叶蛀食,不结苞;晚稻孕穗阶段遇上高温条件,70％左右的幼虫,甚至4龄幼虫不束尖结苞,而躲在稻穗或叶鞘内蛀食。因此,查低龄幼虫的虫量时, Rice leaf roller is one of the main pests of rice in our province to 2 and 4 generations occurred more serious, respectively, the early rice and late rice were severely endangered. Prevention and control of rice leafroller should make an article on the clever words, both targeted, improve control efficiency, but also save pesticides and protect natural enemies. Look at the weather clever use of some of the year when the rice leafroller big occurrence, just met long-term overcast. The survey found: late stage rice tillering stage of 50% to 70% of larvae, hiding in the heart leaf eating, not bud; late stage of booting rice encounter high temperature conditions, about 70% of larvae, and even the 4th instar larvae are not pointed knot, and Hiding in the rice sheath or sheath eaten. Therefore, check the amount of young larvae of insects,