It can be prevented by the following measures:

1. Clean orchard, intertillage and weed, and strengthen ditch cleaning and drainage in rainy season.

2, pruning and shaping, removing branches of diseases and pests, old and weak branches and overlapping branches, so that the tree body is open and transparent.

3, drug control, divided into disease prevention and insect prevention, especially in early spring, it is very important to spray sulfur mixture to clean the garden before plum tree germination. In May and June, you can spray diniconazole or chlorothalonil and other antibacterial pesticides in the orchard for half a month 1 time, 3-4 times in a row. For fruit trees with serious gum flow, the bark can be cut longitudinally in the affected area, and then Pomei 5 degree stone sulfur mixture or other antiseptic pesticides can be applied at intervals to prevent and control fruit tree pests.

4. Fertilize to improve the nutrition and disease resistance of fruit trees. After the fruit is picked, thoroughly apply decomposed organic fertilizer to the roots, with a small amount of phosphorus and potassium fertilizer. The choice and dosage of specific fertilizer is determined according to the soil fertility of your park and the age of fruit trees. Irrigation is permeable once after fertilization. Be careful not to get too close to the roots and cause fat damage.

I hope these experiences can help you!