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为筛选能有效防治茶园斜纹夜蛾的低毒化学药剂,采用20%氯虫苯甲酰胺乳油、15%茚虫威乳油、10%虫螨腈悬浮剂、2%甲维盐乳油等4种低毒化学农药与茶园常用药剂4.5%高效氯氰菊酯乳油进行田间药效对比试验。结果表明:氯虫苯甲酰胺、茚虫威、虫螨腈和甲维盐在推荐剂量下,药后3~10d,对茶园斜纹夜蛾有较好的防效,其中以虫螨腈的防效最高,达90%以上。氯虫苯甲酰胺、茚虫威、虫螨腈和甲维盐等4种低毒化学农药适用于防治茶园斜纹夜蛾,值得在无公害茶叶生产中大力推广应用,但应注意交替轮换使用,以延缓害虫抗药性的产生。
In order to screen low-toxic chemical agents that can effectively prevent and cure Spodoptera frugiperda, four low-toxicity chemicals, 20% chlorantraniliprole, 15% indoxacarb, 10% chlorfenapyr and 2% Poison chemical pesticides and tea plantation commonly used 4.5% beta-cypermethrin EC for field efficacy comparison test. The results showed that chlorantraniliprole, indoxacarb, chlorfenapyr and emamectin benzoate had good control effects on Spodoptera litura in tea plantation at the recommended dosage from 3 to 10 days after treatment, The highest efficiency, up to 90%. 4 kinds of low toxic chemical pesticides such as chlorantraniliprole, indoxacarb, chlorfenapyr and carbaryl are suitable for controlling Spodoptera frugiperda in tea plantations and are worth popularizing and applying in the production of pollution-free tea. However, care should be taken to use them alternately, To delay the emergence of pest resistance.