杨树吉丁虫(Poecilonota variolosa)是杨树主要蛀干害虫之一,分布于辽宁、吉林、黑龙江、内蒙古等省区,是‘三北”防护林的一大害虫。为摸清该虫为害规律,探求适当的防治措施,我们进行了实地调查与试验,现将结果介绍如下。一、为害情况与天敌对6900亩杨树人工林地做了调查(见表1) 。 Poecilonota variolosa, one of the major pests of poplar, is distributed in Liaoning, Jilin, Heilongjiang and Inner Mongolia provinces and is one of the major pests in the “Three North” Shelterbelt. Appropriate control measures, we conducted a field survey and testing, the results are as follows: First, the damage situation and natural enemies of 6900 acres of poplar plantations were investigated (see Table 1).