近年来梨木虱在我市梨区发生普遍,成为梨生产中的一大害虫。特别是软儿梨、冬果梨、苹果梨等地方树种上发生较重。洋梨系统发生较轻,该虫危害以若虫刺吸梨树的叶片、芽、果实等,致使受害叶干枯、早期脱落,同时若虫分泌的粘液被霉菌污染后呈煤灰状污液, Pear lice in our city in recent years, the prevalence of pears, pears in the production of a major pest. Especially soft pear, winter pear, apple pear and other places on the occurrence of heavier species. Pear system occurred lighter, the insect endanger the pear nymphs sucking pear leaves, buds, fruits, resulting in the victim leaves dry, early fall off, while the nymphs secreted by the mold after the mold was contaminated with coal ash-like sewage,