云杉梢斑螟是云杉的主要枝梢害虫,也危害油松。以幼虫危害云杉新梢嫩叶、花序及球果,使新梢不能抽出,或新梢弯曲下垂干枯,或形成虫瘿。林木连年受害后树冠秃顶,枯梢密布,高生长受到抑制,植株呈灌丛状,严重影响林木的正常生长。从本世纪初开始,云杉梢斑螟在甘肃中南部地区大范围发生,造成经济损失上亿元,成为许多地方预防除治的重点对象。 Spruce shoots borer is the main spruce pests, but also endanger the Pinus tabulaeformis. The larvae endanger spruce shoots young leaves, inflorescences and cones so that the shoots can not be extracted, or shoot bending droop dry, or the formation of insects. Trees suffered bald after successive years of damage, dry branches, high growth was inhibited, the plant was shrub-like, seriously affecting the normal growth of trees. Since the beginning of this century, the sphagnoderm has occurred on a large scale in south central Gansu province, causing hundreds of millions of yuan of economic losses and becoming the focus of prevention and cure in many places.