几种不同杀虫剂对稻纵卷叶螟防治效果评价

为筛选经济有效安全药剂防治稻纵卷叶螟,对20%氯虫苯甲酰胺（康宽）SC、10%氟虫双酰胺.阿维菌素（稻腾）SC、生物农药病毒增强Bt WP以及甲维盐WG等几种杀虫剂进行田间药效试验,结果表明,20%氯虫苯甲酰胺SC、10%氟虫双酰胺.阿维菌素SC药剂防治稻纵卷叶螟用量分别为10 mL/667m2、30 mL/667m2时,在药后7 d的保叶效果分别为88.6%、79.7%,在药后14 d的保叶效果分别为90.9%、86.2%。20%氯虫苯甲酰胺SC、生物农药病毒增强Bt WP、200 g/667m2 5.7%甲维盐WG在药后7～14 d用量分别为10 mL/667m2、200 g/667m2、14 g/667m2时,对稻纵卷叶螟的防治效果分别为89.0%～100%、53.2%～88.3%、84.4%～97.7%,防效均超过80%;另外,1.8%阿维菌素EC 50 mL/667m2在药后14 d对稻纵卷叶螟的防效由药后7 d 76.7%上升为81.2%,可见,以上几种药剂均能作为防治稻纵卷叶螟的较理想药剂。

The Evaluation of Efficacies of Several Different Insecticides against Cnaphalocrocis medinalis

In order to effectively control Cnaphalocrocis medinalis,we chose 20% chlorine benzamide（Kangkuan） SC,10% fipronil bisamide.avermectin（Daoteng） SC,Bt WP and avermectin benzoate WG to control Cnaphalocrocis medinalis in field trials.The results showed that 7 days after application,the effects of Kangkuan at 10 mL/667m 2 a nd Daoteng at 30 mL/667m 2 were 88.6% and 79.7%,respectively.After 14 days of application, the effects of the Kangkuan and Daoteng were 90.9% and 86.2%,respectively.The insecticidal effects of,Daoteng at 10 mL/667m 2,Bt at 200 g/667m 2 and avermecin benzoated WG at 100 g/667m 2 were 89.0% to 100%,53.2% to 88.3%,84.4% to 97.7%,respectively,at 7 to 14 days after application.The control efficiency of those 4 insecticides were higher than 80%.In addition,the efficacy of 1.8% avermectin EC at 50 mL/667m 2 increased to 81.2% from 76.7% 14 d after application.