从你的来信和标本分析鉴定,你的桃树是得了烂根病。这种病在山西、陕西果产区发生比较严重。除为害桃树外,还为害苹果、梨、山楂等。此病为害毛根、侧根、主根。根部最初产生红褐色斑点,后渐扩展为棱 From your letter and specimen analysis to identify, your peach tree got rotten root disease. This disease is more serious in Shanxi and Shaanxi fruit producing areas. In addition to pest damage, but also damage apples, pears, hawthorn and so on. The disease damage hair root, lateral root, main root. Roots initially produce red-brown spots, gradually extended to edge