杨树占我市林木总株数 1 3还多 ,因此其腐烂病及溃疡病的防治是应作为关注热点。主要发病时间为每年早春 ,平均气温 10～ 15℃阶段。腐烂病、溃疡病均为病菌感染 ,易感弱势木 ,与树皮含水量成负相关关系。防治以营林措施为基础 ,加强苗木检疫 ,病部及时涂碱水等药物。 Poplar accounted for the total number of trees in our city more than 13, so the prevention and treatment of its rot disease and ulcer disease should be as hot spots. The main onset time is early spring each year, the average temperature of 10 ~ 15 ℃ stage. Rotten and ulcer diseases are pathogen infection, susceptible to vulnerable wood, and water content of bark has a negative correlation. Prevention and control measures based on the forest, to strengthen seedling quarantine, timely coating of illnesses and other drugs.