Experiment on the aerial spray of Sendebao wettable powder against Dendrolimus punctatus

The control experiment of aerial spray of mixture of Bt,abamectin and DPCPV with different concentrations and Sendebao wettable powder against Dendrolimus punctatus was made in 2006 and the mortality was investigated 1,3,10,30 days respectively after the treatments.The mortality was above 87% in all treatments in 30 days and there was no significant difference among the treatments.But the mortality in the treatment with Sendebao was obvious higher than that of the other treatments 1-10 days after the spray.