Abstract: In recent years,a leaf-eating pest,Heortia vitessoides,was found in a large area in the plantation of Aquilaria sinensis in Xishuangbanna,which caused serious damage to the plantation.In order to explore an effective way to control this pest,five insecticides were selected to carry out the control experiment in the 4-year-old A. sinensis plantation in Puwen Town,Xishuangbanna.The results showed that all the five insecticides had certain control effects on the larvae of Heortia vitessoides,and the insecticidal efficacy of methyl-indenocarb and emamectin benzoate was better.The corrected mortality rate of the three pesticides reached 100% one day after treatment,followed by chlorpyrifos and cypermethrin reaching 100% two days after treatment and 2.5% cyhalothrin reaching 100% 4 days after treatment., effect of 5%matrine was the weakest one day after treatment,but mortality rate could reach 75% four day after treatment.