冬季前后防治梨木虱￥河北迁安市林业局＠张东升冬季前后防治梨木虱梨木虱近年发生普遍严重，叶片被害后出现坏死斑，尤其大量排泄物粘于叶面和果实，污染果实和叶片，引起霉菌寄生，不仅影响树体发育，而且使果实失去商品价值。梨木虱以成虫在树皮缝、树洞和落叶下越冬，早春花... Prevention and treatment of pear lice before and after winter ¥ Qian’an Forestry Bureau of Hebei @ Zhang Dongsheng Pre-winter prevention and control of pear lice Pear lice occurred in recent years, generally serious, necrosis spots after the leaves were killed, in particular, a large number of excretion sticky to foliage and fruits, pollution of fruits and leaves, causing Mold parasitic, not only affect the development of trees, but also the loss of fruit value of the commodity. Pest lice to adults in the bark seam, trees and deciduous winter winters, early spring flowers ...