吡蚜酮与异丙威复配对褐飞虱的增效作用和田间防治  

Biological Activity and Control Effect of Nilaparvata lugens on the Pymetrozine and Isoprocarb and Mixed Pesticides

作　　者：束兆林[1] 吉沐祥[1] 缪康[1] 赵来成[1] 方继朝[2] 郭慧芳[2] 

机构地区：[1]江苏丘陵地区镇江农科所,江苏句容212400 [2]江苏省农科院植物保护研究所,南京210014

出　　处：《农药》2009年第5期381-383,共3页Agrochemicals

基　　金：江苏省农业科技创新项目子课题(cx0610806-3);镇江市农业科技攻关项目(NY2007043)

摘　　要：室内生测结果表明:吡蚜酮与异丙威质量比为1﹕2,对褐飞虱3龄若虫具有较高的生物活性,其LC50值为11.01mg/L,共毒系数为166.65,表现出明显的增效作用;按此配比加工成30%吡蚜·异丙威WP(有效成分:吡蚜酮10%、异丙威20%)。田间防治结果表明:该混剂对褐飞虱表现出良好的速效性和持效性。药后3d,30%吡蚜·异丙威WP450～600g/hm2对褐飞虱若虫的防治效果为90.83%～94.94%,药后21d,30%吡蚜·异丙威WP450～600g/hm2对褐飞虱若虫的防治效果仍有87.60%～89.32%,均好于对照药剂吡蚜酮、异丙威对褐飞虱的防治效果。从防效和经济的角度考虑,30%吡蚜·异丙威WP推荐剂量为450g/hm2,防治适期宜在褐飞虱若虫高峰期。The result of the biological activity showed that the LC50 and co-toxicity coefficient（CTC） of the mixture of pymetrozine and isoprocarb at the ratio of 1：2, which had excellent effect against the 3 th larval stage of Nilaparvata lugens, were 11.01 mg/L and 166.65, respectively. The mixture indicated addition effect, obviously. The results of field trials of pymetrozine and isoprocarb 30% WP which content pymetrozine and isoprocarb at the ratio of 1：2, showed that the mixture reagent had favorable quick-acting and persistent effects. The effect of pymetrozine and isoprocarb 30% WP at the dose of 450-600 g/ha was 90.83-94.94% after 3 days, and was still 87.60-89.32% after 21 days, which were all much better than pymetrozine or isoprocarb. So pymetrozine and isoprocarb 30% WP at the dose of 450 g/ha is recommended for controlling Nilaparvata lugens.

关 键 词：吡蚜·异丙威 褐飞虱 生物活性 防治效果 

分 类 号：S435.112[农业科学—农业昆虫与害虫防治]