锐劲特和艾美乐对水稻害虫防效的综合评价

Conprehensive evaluation of the control effect of rice pest on confidor and pronil

锐劲特水分散粒剂和艾美乐水分散粒剂在南亚热带稻区防治水稻多种害虫的效果及其对稻田害虫天敌的影响试验结果表明,每667 m2稻田施用70%艾美乐3 g+80%锐劲特2 g防治稻纵卷叶螟和稻飞虱药效明显而持久,防效达100%;单用70%艾美乐3 g或10%吡虫啉30 g对稻纵卷叶螟无防效治作用;各施药处理与清水对照相比对防治稻飞虱表现出较佳防治效果;70%艾美乐3 g+80%锐劲特2 g处理可防治多种水稻害虫,但对害虫天敌都有一定的杀伤力。

The objective of this study was to evaluate the toxicity of .pronil and to determine the potential hazard posed by this insecticide to pest and their natural enemies.in rice paddy in South subtropical zone. The results showed that： 80%WG fipronil 3 g/667m^2, and 70% WG confidor- 2 g ＋ 80%WG fipronil 2 g/667m^2 had best result in controlling Cnaphalocrocis medinalis （Guence） and other rice pest for a long time. But all insecticides had toxicity to predatory natural enemies in rice paddy. Species richness and community diversity of predatory natural enemies took from dissimilarly by using different insecticides. The individual number controlled with fipronil was more than the other insecticides. This paper proved that fipronil had better effect for controling pest and was safer than other insecticides.