毒死蜱·甲胺基阿维菌素苯甲酸盐对稻纵卷叶螟的防治效果

为了探讨毒死蜱.甲胺基阿维菌素苯甲酸盐对稻纵卷叶螟的防治效果。在随机区组设计的田间试验中,在稻纵卷叶螟低龄幼虫高峰期,采用20%毒死蜱.甲胺基阿维菌素苯甲酸盐WP 7509、001、050 g/hm2,48%乐斯本EC 900 ml/hm2,1%甲胺基阿维菌素苯甲酸盐EC 225 ml/hm2和清水对照(CK)6个处理,通过施药前的基数调查和药后7 d的药效调查,研究了毒死蜱.甲胺基阿维菌素苯甲酸盐对稻纵卷叶螟的防治效果。药后7 d,用20%毒死蜱.甲胺基阿维菌素苯甲酸盐WP 7509、001、050 g/hm2,对稻纵卷叶螟的防效分别为79.9%、85.1%和86.8%,对二化螟的防效分别达64.1%、78.8%、85.7%。20%毒死蜱.甲胺基阿维菌素苯甲酸盐可湿性粉剂对稻纵卷叶螟有良好的防治效果,兼治二化螟,且对水稻生长安全。

Preliminary Study on Control Effect of Chlorpyrifos and Methylamine-avermetins-benzote on Cnaphalocrocis medinalis

The purpose was to discuss the control effect of chlorpyrifos and methylamine-avermetins-benzote on Cnaphalocrocis medinalis.In field test randomized block design was used,during the peak period of younger instar larvae of C.medinalis,6 treatments of 20% chlorpyrifos and methylamineavermetins-benzote WP 750 g,900 g and 1 050 g per hectare,48% Lesiben EC 60 ml,1% methylamine-avermetins-benzote EC 225 ml and water(CK) were used to study the control effect of chlorpyrifos and methylamine-avermetins-benzote on C.medinalis through the base investigation before applying insecticide and the drug effect investigation on the 7th day after applying insecticide.On the 7th day after applying insecticide,the control effect of 20% chlorpyrifos and methylamine-avermetins-benzote WP 750 g,900 g and 1 050 g per hectare on C.medinalis were 79.9%,85.1% and 86.8%,respectively,and those on Chilo suppressalis were 64.1%,78.8% and 85.7%,respectively.20% chlorpyrifos and methylamine-avermetins-benzote WP had a good control effect on C.medinalis,as well as on Chilo suppressalis,and was safe for rice production.