杨树是河南平原地区和西部山地造林的重要速生树种。近几年来由于青杨天牛的危害,已成为植树造林的严重威胁。根据1962年在郑州地区的调查,幼树被害株率达90％以上;枝梢被害率达8.4％左右。 青杨天牛分布于河南的郑州、开封、灵宝、洛阳、南阳、信阳、确山及北京等地。寄主发现有美杨(Populuspyramitalis Borkh)、毛白杨(P.tomentosa Carr.)、小叶 Poplar is an important fast-growing tree species afforestation in mountainous areas of Henan and western mountains. In recent years as a result of the harm of Greenpea, it has become a serious threat to afforestation. According to a survey conducted in 1962 in the Zhengzhou area, the rate of saplings in saplings reached more than 90%; and the rate of damage to shoots reached 8.4%. Qingyang Tian cattle distribution in Henan, Zhengzhou, Kaifeng, Lingbao, Luoyang, Nanyang, Xinyang, indeed Hill and Beijing. The hosts found Populus pyramerica Borkh, P. tomentosa Carr., Leaflets