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一、危害症状 桃红颈天牛,是近年来造成兰州地区桃、杏园树本死亡的主要钻蛀性害虫。它以幼虫在树体木质部钻蛀成一扁园形,深达10厘米以上,大致向上的潜藏洞,并沿洞前的皮层部位向下开掘取食面,危害状呈扇形面,形成树皮下空洞,向上推挤木屑、粪便,使的侵入孔外形成明显的木屑条或木屑堆。造成受害部位流胶。渗水或腐烂。幼虫体长1—8厘米因虫龄大小而不等,在树体内至少可存活3年左右,最后在潜藏洞顶部蛀成与树干
First, the harm symptoms Pink neck cerambycidae, in Lanzhou in recent years caused by the peach, apricot garden tree-borne main pest insects. It larvae in the tree xylem borehole into a flat-shaped garden, up to 10 cm deep, generally upward hidden cave, and along the caves in front of the cave dig down the feeding surface, endanger the fan-shaped surface, the formation of bark under the hole , Push up the sawdust, excrement, so that the formation of significant invasion of the hole sawdust or sawdust pile. Caused parts of the flow of plastic. Seepage or decay. Larvae body length of 1-8 cm due to the size of insects vary, at least in the tree can survive for about 3 years, and finally lined the top of the hole into the trunk and trunk