What is peach root cancer? How to prevent and cure it?

What is peach root cancer? How should peach root cancer be prevented and treated effectively? Peach root cancer symptoms: first, peach root cancer is caused by root cancer Agrobacterium tumefaciens, is a bacterial disease. After the peach tree is damaged, cancer tumors of different sizes, spherical or oblate are formed in the roots or branches. After fusion into an irregular shape, and then gradually become brown, rough surface, Lignification hard, the formation of irregular cavity. After the seedlings were injured, the development was blocked, the growth was slow, the plants were short, and the leaves were yellowed and aged prematurely. The adult fruit tree is damaged, the fruit is small, and the age of the tree is shortened. Peach root cancer control 2, control methods 1, grafting from the higher part of the improved parent tree to take scion, using bud grafting, try not to split grafting. Grafting tools should be sterilized with 75% alcohol before and after use. All rootstocks used for grafting should be soaked in 1% copper sulfate solution for 5 minutes before budding, and then soaked in 2% lime water for 1 minute. 2. Strengthen cultivation management, select disease-free soil as nursery, and properly apply acid fertilizer or organic fertilizer when planting on alkaline soil; orchards or old orchards that have had root cancer disease can not be used as seedling bases. 3. At the initial stage of the disease, the tumor was thoroughly removed with a quick knife, and the wound was disinfected with 0.1% copper sulfate solution or 80% 402 antibacterial agent EC 50 times, and then protected by Bordeaux slurry; the soil around the disease plant can be disinfected with 2000 times solution of antibacterial agent 402. 4. Control underground pests and reduce the incidence of disease. More peach tree planting techniques