杨尺蠖(Apocheima cinerarius Erschoff)又名春尺蠖、沙枣尺蠖、榆尺蠖等,广泛分布我国的新疆、甘肃、内蒙、青海、宁夏等十多个省区,是我国三北防护林的主要害虫之一。此虫主要危害杨、柳、榆、槐、沙枣、桑、槭、桦、宁条、花棒、沙柳及多种果树,每年发生面积达600多万亩。此虫每年发生一代,成虫出现期早、幼虫发生期短、食量大,发育快,常暴发成灾,对树木生长及果实产量影响很大。如沙枣、宁条、榆树等的种实受害一次产量约减低90%,甚至颗粒无收;如连续危害 Apocheima cinerarius Erschoff is also known as the spring peasants, the jujube scales and the elk scales. It widely distributes over 10 provinces and autonomous regions including Xinjiang, Gansu, Inner Mongolia, Qinghai and Ningxia and is one of the major pests of the Three North Shelterbelt . The main hazards of this insect willow, willow, elm, Sophora japonica, jujube, mulberry, maple, birch, Ning, Hualien, Salix and a variety of fruit trees, the annual occurrence of more than 600 acres. This pest occurs a generation each year. Early emergence of adult pests, short period of larvae, large food intake, rapid development and frequent outbreaks have a great impact on tree growth and fruit yield. Such as dates, ning, elm trees and other seed production reduced by about 90%, or even crop failure; such as continuous harm