近年来，梨木虱在黄河故道地区为害较为猖厥，特别是在唐山酥梨、鸡爪黄、马依黄梨树上危害更为严重．一旦进入世代交替时期，梨木或若虫分泌出粘液，置身于估获之中，很难杀灭．用一不慎，即造成叶片导用脱带，梨果生长缓慢，表面光洁度差，果皮本柱展化，后期果实脸大系只小 In recent years, pear psyllids in the Yellow River anomaly damage is more rampant, especially in Tangshan Pear, Jixiao Huang, Ma Yuehuang Pear more serious harm. Once into the turn of the generation, pear wood or nymphs secreted mucus, exposure to the assessment, it is difficult to kill. Inadvertently, which led to the use of leaves with tape off, slow growth of pear, the surface finish is poor, peel the column of the exhibition, the late fruit face large only small