梨木虱的生活习性和防治技术从１９８９年以来，梨木虱在我县为害梨树渐趋严重。经过对梨木虱生活习性的观察，基本掌握了发生发展规律，通过采取综合防治措施，获得了较好的防治效果。１梨木虱的生活习性梨木虱在我县一年发生５代，２代以后出现世代重叠。以越冬型成虫在... Pear lice habits and prevention and control technology Since 1989, pear lice Pear trees in our county become more serious. After observing the living habits of pear psitts, the basic rules of occurrence and development were mastered. By adopting comprehensive prevention and control measures, good control effects were obtained. 1 Pear lice habits Pear lice occur in our county five generations a year, after two generation generations overlap. To wintering adults in ...