Effect Test of Several Pesticides Controlling Plutella xylostella(L.) of Cruciferae

[Objective] The research aimed to study the effects of several pesticides controlling Plutella xylostella(L.) of Cruciferae,to screen high effective,low poison and low remnant pesticides,to promote the sustainable development of uncontaminated vegetable production.[Method] Five treatments including Tanyou(37.5% thiodicarb SC),Yitaibao(5% chlorfluazuron EC),Chongmanke(1.8% Avermectin EC),Keebao(15% abamectin·phoxim EC) and contrast were designed to make the effect test of controlling Plutella xylostella(L.).The remnant number of larvae was investigated in cabbage(Brassica oleraces var.capitata L.) signed after treated 3,7,15 days.[Result] The control effects of Keebao after treated 3,7,15 days were 82.4%,81.5%, 79.6% respectively,and those of Tanyou,Yitaibao and Chongmanke were all over 60.2%,but all less than Keebao.The difference analysis showed that there were significant differences on the control effect between Keebao and Tanyou,Yitaibao and Chongmanke after treated 3,7 days.There were very significant differences on the control effect between Keebao and Tanyou,Chongmanke after treated 15 days,and there was significant difference between Keebao and Yitaibao.[Conclusion] Keebao(15% abamectin· phoxim EC) is a good pesticide for controlling Plutella xylostella(L.) of Cruciferae,and also a new type mixed insecticide replacing normal pesticides