杨树腐烂病,又称烂皮病,是由黑腐皮克属一些真菌引起的干枝病害,它对杨属和柳,榆等树种危害极大。该病是潜伏侵染性病害。当出现干旱、水涝、冻害、日灼等恶劣条件,以及苗木移植或强度修剪后不易恢复树木生机时,病害就迅速发生,轻者影响树木生长,出现放叶晚、叶片变小,枯枝、枯干等病状,重者造成树木成片死亡。 Poplar rot disease, also known as rotten skin disease, is a dry branch disease caused by some fungi of black phlox, which is extremely harmful to poplar, willow and elm trees. The disease is a latent infectious disease. When the drought, waterlogging, frost damage, sunburn and other harsh conditions, and seedling transplantation or strength pruning difficult to restore the vitality of trees, the disease occurred rapidly, the light affect the growth of trees, the leaves appear late, leaves smaller, dead branches , Withered and other symptoms, severe cases of trees caused by death.