Abstract:This paper deals with a set of techniques using trees [Morus alba L., Broussonetia kazinoki S, et Z., B. papyrifera (L, )Vent] as baits to control the adults of Apriona germari (Hope), which can prevent poplar plantation from being damaged. The methods, simple, economical and easily conducted, can segregate poplar plantation with pest and kill them before oviposition outside the poplar plantation. In the stands sprayed with insecticide there were at most 19 death adults in one clump of bait one day. It costed 0.084 Yuan (RMB) per mu. The mean yearly rate of trees injured reduced by 1.89%, The pest density stabilized with no increase or decrease. But in control stand the average rates of trees damaged and pest density enhanced 31.53% and 1.07 respectively compared with the stands sprayed with insecticide. The difference is very significant (statistical analysis).