多杀菌素对小菜蛾及其天敌的毒力研究  

Toxicity of spinosad to Plutella xylostella (L.) and its natural enemies

作　　者：徐建祥[1] 乔静[1] 仲崇翔[1] 

机构地区：[1]扬州大学农学院植物保护系,扬州225009

出　　处：《中国生态农业学报》2005年第4期161-163,共3页Chinese Journal of Eco-Agriculture

基　　金："十五"江苏省科技攻关项目(BE2001328)资助

摘　　要：研究评价多杀菌素(菜喜)对小菜蛾及其主要天敌的毒力结果表明,菜喜对小菜蛾具有很高的毒力和良好的田间防治效果,菜喜对青翅蚁型隐翅虫和菜蛾绒茧蜂具有直接杀伤作用,其1000倍稀释液24h使菜蛾绒茧蜂死亡率达62.2%,36h死亡率达88.7%,药液直接处理寄生蜂茧或饲喂均导致很高的死亡率,但对拟环纹狼蛛影响较小。多杀菌素对小菜蛾有很好的控制效果,但对小菜蛾天敌,特别是寄生蜂有相当的负面影响。The toxicities of spinosad to Plutella xylostella and its natural enemies are evaluated in this paper. The results show that spinosad has a high toxicity to P. xylostella and a high efficacy against the pest in fields. Spinosad has a lethal effect on Paederus fuscipes and C. plutellae, but no significant effect on Lycosa psedoannulata. For C. plutellae, the treatment with 1000 times dilution of 2.5% CAIXI causes its mortality of 62.2% after 24h and 88.7% after 36h. The side-effects of spinosad on parasitoid of P. xylostella are very high and should be considered when the pesticide is used.

关 键 词：小菜蛾 多杀菌素 毒力 天敌 毒力研究 菜蛾绒茧蜂 田间防治效果 死亡率 杀伤作用 控制效果 

分 类 号：S763.350.6[农业科学—森林保护学] S482.3[农业科学—林学]