3种药剂组合在水稻不同生育期的使用效果

研究了安徽沿淮中稻不同生育期药剂处理对主要害虫及天敌的影响。结果表明,在水稻分蘖至拔节期和孕穗期至成熟期,锐劲特-锐劲特处理组合对水稻主要害虫稻纵卷叶螟和稻飞虱的控制效果最好,其次是Bt+杀虫剂-锐劲特组合和Bt-锐劲特组合。这几种药剂处理对天敌均有一定的保护作用。从害虫防治、天敌保护和延缓害虫产生抗药性综合考虑,Bt+杀虫剂-锐劲特组合以及Bt-锐劲特组合是比较合理的药剂处理组合。

Effects of Several Insecticide Treatments in Different Growth Stages of Rice on Major Insect and Their Natural Enemies

The effects of several insecticide freatments in different growth stagea of rice on major insect pests and their natural enemies in the middle rice fields along the HuaiheRiver of Anhui Province were studies in this paper. The results showed that in tillering-jointing stage and booting-ripe stage of rice ,the control effects of firoinl-fipronil association on major insect pests, Cnaphalocrocis medinalis and plantopper were the best and Bt ＋ shachongshuang-fipronil association and Bt-fipronil association the second. In comprehensive consideration of pest eontrol, natural enemy protecyionanddelayingtheresistanceofpeststoinsecticides, Bt ＋ shachongshuang-fipronil association and Bt-fipronil association were relatively the reasonable insecyide treatment associations.