梨星毛虫是海原县果产区危害最普遍、最严重的食叶害虫,仁果类果树它都危害,特别喜食花红(沙果)和青香蕉苹果叶片。越冬二龄幼虫四月上旬开始从树干翘皮裂缝中陆续爬出,直到五月上旬才出蛰完毕。出蛰期长达月余(这对药剂防治十分不利)。 Pear cinnabar is the most common and serious pests in the fruit producing area of ​​Haiyuan County. It is harmful to the pome fruit trees, especially for the flower red (sago) and green banana apple leaves. The second-instar larvae began to crawl from the stems and barks in early April in early April, and did not complete the sting until early May. Sting out for more than a month (which is very adverse drug control).