青杨天牛是我区森林植物检疫对象之一,为害多种杨树的嫩枝和幼树树干,在我区普遍发生,有些地区危害十分严重。青杨天牛幼虫蛀入木质部为害,在髓心处蛀成坑道,被害处形成纺锤形虫瘿,易使枝梢干枯、风折,造成树冠畸形,秃头或形成“小老树”,影响造林质量。由于青杨天牛幼虫在幼干和枝条内部为害,给防治工作造成困难,致使青杨天牛逐渐扩散,为害越来越严重。山东省于1975年,在青杨天牛幼虫体上发现了天敌——肿腿蜂。近年来,河北、山西等省及我区土默特左旗等地已引进并进行了较大面积的中间试验。通过观察研究认为:肿腿蜂钻蛀性强,对青杨天牛寄生率较高,可在室内大量繁殖,繁蜂工 Qingyang termites is one of the objects of forest quarantine in our area, the destruction of a variety of poplar twigs and young tree trunks, in our area generally occur, in some areas the damage is very serious. Young coot larvae eroded xylem damage, mothways into the mound at the medullary heart, killing the formation of spindle worm, easy to make shoots dry, wind fold, resulting in crown deformity, bald or the formation of “small trees,” affecting the quality of afforestation. As the young coot of Young Populus euphratica in young stems and branches of internal damage, prevention and control work to create difficulties, resulting in the gradual proliferation of Poplar, the damage more and more serious. Shandong Province in 1975, discovered in Qingyang Tian cattle larvae natural enemies - swollen legs bee. In recent years, Hebei, Shanxi and other provinces and our region Tumotezuoqi and other places have been introduced and conducted a larger area of ​​the intermediate test. By observing and researching that: swollen legs beetle moth resistance, high incidence of parasitism on the Green Poplar, can be a large number of indoor multiplication,