1 早春防治 梨木虱越冬代成虫一般都在2～3月出蛰上树,此时期为早春防治的关键时期。喷施20％灭扫利2500倍液,或50％甲基1605农药2000倍液,控制全年危害作用很大,重点喷施树干,药量要大,以淋洗式为宜。2 治好一代 第一代若虫发生期较集中,且无世代重叠现象,有利防治。可用20％梨虱霸1500～2000倍液,25％功夫4000倍液,或40％水胺硫磷1500倍液,或40％氯氰菊脂1500倍液等农药进行防治。3 提高防效 梨木虱若虫孵化后1～2天就分泌 1 early spring pear pest control overwintering adults are generally 2 to 3 months out of the tree sting, this period is the critical period of early spring prevention and control. Spray 20% off Lee 2,500 times the liquid, or 50% methyl 1605 pesticides 2000 times the liquid, the control of a great harm throughout the year, the key spraying trunk, the dosage should be large to rinse appropriate. 2 cure a generation of first generation nymphs more concentrated during the occurrence, and no overlap of generations, favorable prevention and treatment. Available 20% pear lice Pa 1500 ~ 2000 times, 25% Kung Fu 4000 times, or 40% 1500 times of ammonium desulphite, or 40% of cypermethrin 1500 times and other pesticides for prevention and treatment. 3 to improve the control pear lice nymphs hatch after 1 to 2 days to secrete