70%氯虫苯甲酰胺·甲氧虫酰肼WG防治稻纵卷叶螟药效试验

Experimental Study on 70%Chlorantraniliprole·methoxyfenozide WG to Control the Cnaphalocro⁃cis medinalis Guenee

为了探究70%氯虫苯甲酰胺·甲氧虫酰肼WG在水稻田对稻纵卷叶螟的防治效果、使用适期、合理用量及其对水稻的安全性,以35%氯虫苯甲酰胺WG和240g/L甲氧虫酰肼SC作为对照药剂,开展了70%氯虫苯甲酰胺·甲氧虫酰肼WG防治水稻田稻纵卷叶螟田间药效试验。结果表明,70%氯虫苯甲酰胺·甲氧虫酰肼WG的防效达93%以上;综合田间稻纵卷叶螟的处理防效值以及实际使用成本,以70%氯虫苯甲酰胺·甲氧虫酰肼WG应在稻纵卷叶螟卵孵高峰期施用1次、制剂用量为45~60g/hm^(2)最为适宜。

In order to explore the efficacy,suitable use time,reasonable dosage and safety of 70%chlorantraniliprole·methoxyfenozide WG in controlling Cnaphalocrocis medinalis Guenee in paddy fields,the field efficacy test of 70%chlorantraniliprole·methoxyfenozide WG in controlling Cnaphalocrocis medinalis Guenee in paddy fields was carried out with 35%chlorantraniliprole WG and 240g/L methoxyfenozide SC as control agents.The control effect of 70%chlorantraniliprole·methoxyfenozide WG is over 93%.Considering the control effect value and actual use cost of Cnaph⁃alocrocis medinalis Guenee in the field,70%chlorantraniliprole·methoxyfenozide WG should be applied once during thepeakperiodofeggincubationof Cnaphalocrocis medinalis Guenee,andtherecommendeddosageis 45-60g/hm^(2).