Abstract: Maytenus hookeri Leos.is a very good anti-cancer medicinal plant,Teinoptila antistatica Meyrick and Xyrosaris sp.are the important insect pests.A study on these insects were carried out during 1976-1978.According to the field observations,these pests have eight to nine generations a year in Hsishuanpanna,Yunnan Province,and both overwinter in the larval stage.The present paper deals with the bionomics of these two insects and the interrelationships with their surroundings,Three available insecticides were tested against the young larvae and eggs.The results showed 80% DDVP emulsion (1:1000-1500) and 90% dipterex (1:500-1000) are more effective.