六种杀虫剂对水稻二化螟及稻纵卷叶螟的田间防效

Field Control Effect of Six Insecticides for Controlling Chilo Suppressalis and Cnaphalocrocis Medinalis

为了筛选出防治水稻二化螟和稻纵卷叶螟的有效农药,参照农药田间药效试验准则,开展了氯虫苯甲酰胺及其五种复配制剂的田间药效试验。结果显示,30%氯虫苯甲酰胺悬浮剂(施药量75 g a.i./hm^(2))和19.4%甲维·氯虫苯甲酰胺可分散油悬浮剂(施药量75 g a.i./hm^(2))对二化螟的虫口防效和保穗防效均超过90%,60%氯虫苯甲酰胺·吡蚜酮水分散粒剂(施药量150 g a.i./hm^(2))和50%氯虫苯甲酰胺·呋虫胺水分散粒剂(施药量75 g a.i./hm^(2))的防效均超过80%;30%氯虫苯甲酰胺悬浮剂(施药量75 g a.i./hm^(2))、40%氯虫苯甲酰胺·噻虫胺悬浮剂(施药量150 g a.i./hm^(2))和19.4%甲维·氯虫苯甲酰胺可分散油悬浮剂(施药量75 g a.i./hm^(2))对稻纵卷叶螟的保叶防效和虫口防效均在90%左右,60%氯虫苯甲酰胺·吡蚜酮水分散粒剂(施药量150 g a.i./hm^(2))的防效均在85%左右。在二化螟和稻纵卷叶螟的田间防治中,优先推荐使用19.4%甲维·氯虫苯甲酰胺可分散油悬浮剂,其次使用60%氯虫苯甲酰胺·吡蚜酮水分散粒剂,防治二化螟时也可使用50%氯虫苯甲酰胺·呋虫胺水分散粒剂,防治稻纵卷叶螟时也可使用40%氯虫苯甲酰胺·噻虫胺悬浮剂。

For screening effective insecticides for controlling Chilo suppressalis and Cnaphalocrocis medinalis,field efficacy trials of chlorantraniliprole and its 5 compound formulations were conducted with reference to the guidelines for field efficacy trials of pesticides.The field efficacy test results showed that 30%chlorantraniliprole SC(application amount 75 g a.i./hm^(2))and 19.4%emamectin benzoate·chlorantraniliprole OD(application amount75 g a.i./hm^(2))had the best ear protection effect and insect control effects against Chilo suppressalis,both exceeding90%,60%chlorantraniliprole·pymetrozine WG(application amount 150 g a.i./hm^(2))and 50%chlorantraniliprole·dinotefuran WG(application amount 75 g a.i./hm^(2))had better control effects,both exceeding 80%;30%chlorantraniliprole SC(application amount 75 g a.i./hm^(2)),40%chlorantraniliprole·clothianidin SC(application amount 150 g a.i./hm^(2)),and 19.4%emamectin benzoate·chlorantraniliprole OD(application amount 75 g a.i./hm^(2))had the best control effects against Cnaphalocrocis medinalis,all about 90%,the control effect of 60%chlorantraniliprole·pymetrozine WG(application amount 150 g a.i./hm^(2))was better,both about 85%.In the field control of Chilo suppressalis and Cnaphalocrocis medinalis,19.4%emamectin benzoate·chlorantraniliprole OD was preferred,followed by 60%chlorantraniliprole·pymetrozine WG,if only used for field control Chilo suppressalis,50%chlorantraniliprole·dinotefuran WG could also be used,if only used for field control Cnaphalocrocis medinalis,40%chlorantraniliprole·clothianidin SC could also be used.