【摘要】 杨树天牛属鞘翅目,天牛科。根据调查研究每年发生面积在2500 hm2以上,主要危害杨树防护林。从2004~2006年每年危害面积变化不大。从发生严重性来讲,中度发生面积占的比较大。从整个白城市来看,以通榆县、洮南市、洮北区,发生面积大。镇赉县、大安市发生面积相对较小。更多还原

【Abstract】 Saperd populnea,which is a kind of pest mainly in the trunk of poplars,is coleopteran,cerambycidae in taxonomy and can destroy over 2500hm2 poplars protective forests every year.The outbreak area of Baicheng is in the middle serious and not changeable from 2004 to 2006.It is critical in Tongyu,Taonan and Taobei but a little in Zhenlai and Daan according to our investigation.更多还原