Prevention and control methods of mango gummosis: ① prevention and control at seedling stage. Bud grafting seedlings should be planted in a ventilated and dry place, and the interface should be kept dry; Selecting bud strips from a robust mother tree; The grafting knife should be disinfected with 75% alcohol; Pay attention to ventilation and light transmission after budding and unbinding.

② Clear the garden in winter. Combined with pruning and shaping, diseased branches, fallen leaves, dead branches and rotten fruits are thoroughly removed and burned centrally.

③ Scrape off the diseased spots. When lesions are seen on tree trunks and branches, the affected parts should be scraped off immediately until healthy tissues are scraped off, and then the wound should be smeared with Bordeaux pulp (1: 2: 3), that is, copper sulfate, quicklime and fresh cow dung are mixed into ointment, or 70% thiophanate-methyl wettable powder is mixed with cow dung 200 times. Cut off the lower part of dead branches for 20 ~ 30cm, and apply the above medicine to the wound.

④ Strengthen orchard management. Increase the application of organic fertilizer, timely prevent and control borers such as longicorn beetles, and prevent mechanical injuries caused by field operations.

⑤ Chemical control. Spraying 800 times of 3% copper oxychloride suspending agent solution at flowering stage; Every 10- 15 days, spray 1: 160 bordeaux solution, or 800- 1000 times of 70% thiophanate-methyl wettable powder, or 500 times of 50% carbendazim wettable powder.

⑥ Select disease-resistant varieties. Foreign resistant varieties include Hayden, Edward, Illinois, Su Xueduo Lao, etc.