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杨笠圆盾蚧Quadraspidiotus ostreaeformis(Curtis)属同翅目、盾蚧科,笠圆盾蚧属。此蚧是宁夏杨树的主要害虫之一。近几年来,发生面积逐年扩大,为害也越来越严重,有的地区有虫株率达100％。1981年我们在中卫县对此虫进行了专题研究,现将研究结果整理如下。 一、分布及为害情况 此虫分布于东北、新疆、内蒙、宁夏等地,在我区中卫县各林场业已成灾。主要为害箭杆杨、合作杨、群众杨、大官杨等杨树品种,还为害苹果、梨、桃等果树。在中卫县以箭杆杨和合
Quadrocopteris quadraspidiotus ostreaeformis (Curtis) is a Homoptera, Diaspididae, Vasilisaurus. This scale is one of the major pests of poplar in Ningxia. In recent years, the area has expanded each year, the damage is also more and more serious, in some areas the rate of insect strains of 100%. In 1981, we conducted a special study on this pest in Zhongwei County, and the research results are summarized as follows. First, the distribution and damage situation The insects are distributed in the northeast, Xinjiang, Inner Mongolia, Ningxia and other places, Zhongwei County in our district forest farm has been disaster. The main damage arrowhead Yang, Yang cooperation, the masses Yang, Yang and other big poplar varieties, but also damage apples, pears, peaches and other fruit trees. In Zhongwei County to Yang and Hop