沙柳大透翅蛾是沙柳根部一种钻蛀性害虫,危害极大,近年在定边县不少沙柳林地已蔓延成灾,造成一定损失。鉴于此虫目前国内尚未见有报道,我们从1981～1983年对该虫进行了观察,现整理如下。一、名称、危害及分布沙柳大透翅蛾(Aegeria sp.)属鳞翅目(Lepidoptera)透翅蛾科(Aegeriidae)。其种名待定。该虫主要以幼虫钻蛀沙柳(Salix psa-mmophila)根部,对平滩沙地的沙柳为害最为严重,缓坡沙地的沙柳次之,沙丘上的沙柳则很少见到为害。被害沙柳无木屑和虫粪排出,初期从外部看不到任何痕迹,仅在后期受害轻的沙柳丛呈现枯黄,重者整丛干枯死亡,用手摇动常从地面以下根基处断 Salix lanceolata moth is a kind of borer moth borer pests, a great harm, in recent years in Dingbian many Salix forests have spread into disaster, resulting in some loss. In view of this bug has not been reported at home, we observed the worm from 1981 to 1983, are now organized as follows. First, the name, harm and distribution Salix (Aegeria sp.) Lepidoptera (Lepidoptera) Aegeriidae (Aegeriidae). Its species to be determined. The larva mainly bore the roots of Salix psa-mmophila, and were the most harmful to Salix psammophila in Pingtan sandy land. Salix shali no sawdust and excrement of excrement, the initial can not see any traces from the outside, only in the late victims of salix shrubs appear yellowish, severe cases of death in the whole bundle dry, often shaking hands from the ground below the base break