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柳蛎盾蚧（LepidosaphessalicinaBorch），是为害杨柳等多种林木幼树和苗木枝干的危险性害虫，俗称杨牡蛎蚧。西宁郊区发生面积约266．7hm2，被害率为10％。该蚧在西宁地区一年发生一代，以卵在雌虫蚧壳内越冬。据1991年的100个雌蚧壳统计，总卵数5341粒，平均每头雌蚧产卵约53
Lepidosaphessalicina Borch, is the risk of harmful species of poplar and other tree saplings and seedling branches, commonly known as Yang Oyster Kuwana. An area of about 266.7hm2 occurred on the outskirts of Xining with a victimization rate of 10%. The scale in Xining area a generation a year, eggs in the female scale shell overwintering. According to the statistics of 100 female ciliate shells in 1991, the total number of eggs was 5341, with an average of about 53