杨树烂皮病又称杨树腐烂病,是杨树的常见病和多发病。常引起林木特别是防护林、用材林和行道树的大量枯死,是杨树的重要干部病害之一。一、病害症状杨树烂皮病主要发生在主干和枝条上,表现为干腐、枯梢两种类型。干腐型:该类型主要发生在主干、大枝及枝干分杈处。在发病初期,病部呈暗褐色水肿状斑,皮层组织腐烂变软,手压有水渗出,病斑失水后树皮干缩下陷,有时龟裂,并 Poplar rot disease, also known as poplar rot disease, is a common disease and frequently-occurring disease of poplar. Often caused by forest trees, especially shelterbelts, timber and road trees a large number of dead, is one of the important cadre diseases of poplar. First, the symptoms of disease Poplar bark disease occurs mainly in the trunk and branches, manifested as dry rot, dry shoot two types. Dry rot type: This type occurs mainly in the trunk, branches and branches bifurcation. In the early stages of disease, the disease was dark brown edema spots, cortical tissue softening, hand pressure water exudation, dry lesions shrink after the lesion subsidence, and sometimes cracked, and