不同杀虫剂对水稻田主要害虫及天敌的影响

Effects of Several Insecticide Treatments on the Main Pests and Their Natural Enemies in the Rice Fields

[目的]探讨几种杀虫剂处理对安徽沿淮中稻田主要害虫及天敌的影响。[方法]以丰两优1号为供试水稻品种,BtWP、25%杀虫双、18%锐劲特EC和5%高效氯氰菊酯EC为供试药剂,通过大田小区防治试验研究这几种杀虫剂处理对安徽沿淮中稻田主要害虫及天敌的影响。[结果]锐劲特处理对稻纵卷叶螟控制效果最好,对稻田天敌影响较小。Bt,Bt+杀虫双处理对稻纵卷叶螟有较好防治效果,对稻田蜘蛛较安全,有利于保护天敌和加强天敌的自然控制作用。高效氯氰菊酯对稻纵卷叶螟和稻飞虱仅有短期防效,且对稻田天敌杀伤力很大,不宜在稻田继续使用。[结论]该研究为水稻害虫的综合治理提供了依据。

[ Objective ] The aim was to discuss the effect of several insecticide treatment on main pests and natural enemies in rice fields along Huaihe River. [ Method] With Fengliangyou I as tested rice variety, Bt WP, 25% Shachongshuang, 18% fipronil EC and 5% Beta eyper- metbrin EC as tested insecticides, the effect of the several insecticide treatment on main pests and natural enemies in rice fields along Huaihe River in Anhui Province were studied by field control test. [ Result ] The control effect of fipronil treatment on Cnaphalocrocis medinalis was best and it had less effect on natural enemies in rice field. The treatments of Bt and Bt ＋ Shachongsbuang had better control effect on C. medinalis and they were more safe to rice spider, which was benefit to protect natural enemies and strengthen the natural control effect of natural enemies. Beta cypermethrin only had short-term control effect on C. medinalis and rice planthopper, and had large lethality on natural enemies in rice field, so it was not suitable for further use in rice field. [ Conclusion] The research provided the basis for the integrated management of rice pests.