一、梨木虱的发生与为害近年来,梨木虱是我市梨区发生的主要害虫之一。梨木虱以成虫在树皮裂缝和杂草落叶中越冬,春季花芽膨大、鳞片露白时越冬成虫出蛰,花序分离时成虫产卵,落花结束时第一代卵孵化,初孵若虫集中发生,5月上中旬第一代成虫集中发生,6月以后出现世代重叠。 First, the occurrence and damage pear psylla In recent years, pear psylla is one of the major pests in our pear district. Pear louse adults in the bark cracks and weeds deciduous wintering, flower buds dilated in spring, when the scales are white, the overwintering adult insects sting, adult inflorescences spawn when ovulation, the first generation of eggs at the end of flower hatching, The first generation of adults occurred mid-month, with overlapping generations after June.