梨木虱在浙江省义乌市黄花梨上发生较普遍，还诱致煤污病发生。其防治关键时期为：（1）越冬期，冬季清园和刮除翘裂树皮，减少越冬虫口基数。（2）出蛰期．梨木虱出蛰盛期在2月底至3月初，出蛰盛期是第1代卵孵化始期。此时，一方面虫体较虚弱，一方面梨叶尚未长出，成虫和卵均 Pear psyllids in Zhejiang Yiwu Huang pear more common, but also lead to the occurrence of coal pollution. The key period of its prevention and control is: (1) Overwintering period, clearing in winter and scraping away the bark bark cracking, reducing the number of overwintering insect population. (2) a sting. Pest lice out of the peak in late February to early March, out of the first half of the incubation period is the beginning of egg hatching. At this point, on the one hand the body is more weak, on the one hand pear leaves have not yet grown, adults and eggs are