一、分布与危害梨圆蚧在库尔勒地区主要危害梨、苹果、杏、桃、山楂、葡萄和白杨等多种果树和林木。虫体密集群栖在树冠上部和内膛的枝干上,枝皮光滑部位和向阳面较多。2～5年生枝段上虫口密度最大,1年生枝上多集中于芽基周围。梨圆蚧以雌成虫、若虫刺吸枝干、叶片和果实的汁液。嫩枝、叶片受害后干枯脱落;果实受害后出现紫红色的凹陷斑,形成畸形果;枝干受害后,皮层木 First, the distribution and hazards Pear scale in Korla region, the main hazards pear, apple, apricot, peach, hawthorn, grape and poplar and other fruit trees and trees. Insect dense habitat habitat in the crown and the trunk of the trunk, smooth skin and sunny side of the surface more. The population density of 2-5-year-old branches was the largest, and the branches of 1-year-olds were mostly concentrated around bud-base. Pest scales with female adults, nymphs suck sticks, leaves and fruit juice. Twigs, leaves damaged after the dry off; after the fruit damage purple depression spot, the formation of deformed fruit; branch victims, the cortex