近年来,梨木虱在昌黎县发生呈逐年上升趋势,它的种类很多,目前常见的为中华梨木虱,一般以若虫和成虫刺吸危害叶片,使叶片不能正常进行光合作用,从而严重影响了梨树的产量品质。梨木虱成虫体形似小蝉,淡绿色,越冬态成虫红褐色或黑褐色,卵淡黄色,长椭圆形, In recent years, the occurrence of Pestalpus lugens in Changli County has been increasing year by year. There are many kinds of Pear’s psyllid louse. The most common species is Pear’s psyllid louse nowadays, which noxiously nymphal and nymphae are harmful to the photosynthesis, thus affecting the pears Tree yield quality. Pest lice adults like cicadas, light green, overwintering adult red brown or dark brown, egg light yellow, oblong,