混配杀虫剂现场防治德国小蠊的实验研究

Investigation on the field controlling effect of mixed formulation against resistant Blattella germanica

目的 了解 4 8%毒死蜱乳油与 10 %奋斗呐悬浮剂混配现场防治德国小蠊的效果。方法 将 4 8%毒死蜱乳油和 10 %奋斗呐悬浮剂按 1:1比例混配 ,然后将混配杀虫剂按 1:10 0 ,1:15 0 ,1:2 0 0比例稀释后分别用滞留喷洒方法处理 8个现场防治德国小蠊。结果 毒死蜱与奋斗呐混配使用能快速有效控制德国小蠊 ,但不同浓度的防治效果有差异 ,1:10 0比例稀释的 10 0 %杀灭率的持效期为 30d ,1:15 0比例稀释的 10 0 %杀灭率的持效期为 15d ;1:2 0 0比例稀释 2 4h杀灭率仅为 92 .3%。结论 混配杀虫剂用于现场防治德国小蠊具有现实意义。

Objective To report the field controlling effect on resistant Blattella germanica with mixed formulation of 48% Chlorphrifos emulsion and 10% Fendona suspension.Methods Mixing 48% Chlorphrifos emulsion with 10% Fendona suspersion according to the proportion of 1:1,then diluting the mixed formulation of insecticides according to the proportion of 1:100,1:150,1:200 to residual spray 8 spots separately which had been measured resistance to eltamethrin.Results Blattella germanica could be controlled rapidly and effectively on the spot using mixed formulation of Chlorphrifos and Fendona,but there was difference among the continuing efficacy of different concentration.The spot killing rate of concentration diluted according to 1:100 and 1:150 were both 100%,but that of 1:200 was only 92.3% in 24 h.Conclusion Mixed formulation had good effect on field controlling Blattella germanic,and it was an easy way to keep Blattella germanica from being resistant.