胡杨夸圆蚧Quadraspidiotus slavonicus Green属同翅目、盾蚧科。此虫分布广,为害重,是我区杨、柳树的严重灾害。此虫寄生被害林木的枝干和叶片上(第一代),以口针刺入韧皮部或叶肉内吸取养分。可使树皮组织变褐、坏死、干裂,严重时整个树冠干枯秃顶而死。如银川新城区一片以箭杆杨为主的10余万株杨树已濒于死亡。严重地影响着城市绿化、园林观瞻、农田防护和成林成材。1980～1982年我们在银川对此虫作了专题研究,现将试验结果总结 Populus quadrapidata Quadraspidiotus slavonicus Green is a Homoptera, Diaspididae. This worm is widely distributed, heavy damage, is my area Yang, willow serious disaster. This parasitic damage parasitic trees branches and leaves (first generation), acupuncture piercing phloem or leaf to absorb nutrients. Bark tissue can be brown, necrosis, dry crack, severe dry and bald overhead crown died. For example, more than 100,000 poplar-dominated poplars in Yinchuan New City are on the verge of death. Seriously affect the urban greening, garden view Zhan, farmland protection and forest success. From 1980 to 1982, we conducted a special study on this pest in Yinchuan, and summarized the test results