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杨干象鼻虫(Cryptorrhynchus lapathiL.)是杨树枝干的毁灭性害虫,分布于辽宁、吉林、黑龙江和陕西等省。该虫主要为害杨树,其次为害柳树,以加拿大杨、中东杨、沙兰杨受害最重。辽宁省的发生面积达60多万亩,被害严重的铁岭、鞍山、辽阳等地区,有虫株率最高达70%以上,造成林木千疮百孔,林相残缺不全,对以杨树为主的防护林、速生
Cryptorrhynchus lapathi L. is a devastating pest of poplar stems distributed in Liaoning, Jilin, Heilongjiang and Shaanxi provinces. The insects mainly harm poplars, followed by harmful willow trees, with Canada Yang, Middle East Yang, the most severely affected. Liaoning Province occurred in an area of more than 600000 acres, severely damaged Tieling, Anshan, Liaoyang and other regions, the highest rate of insect strains of more than 70%, resulting in forest full of holes, forest incomplete, to poplar-based Shelterbelt, fast-growing