It is imperative to eradicate the gum disease of plum trees.

Plum gum disease is an important disease on the trunk of plum. When the disease is serious, it often causes dry death and has a great impact on the tree potential and yield. It often occurs in the warm and rainy season, especially in the south. Prevention and control measures 1. Strengthen cultivation and management. Plum trees were planted with sufficient base fertilizer, and after entering the bumper year, more fertilizer was applied to promote the healthy growth of plum trees and improve their disease resistance. 2. Eliminate the source of overwintering disease. Do a good job in cleaning the orchard when cutting in winter, collect sick and dead branches and burn them. Dig deep into the soil and sunburn. 3. Scrape off the disease spot. Medicine to protect the wound, we should strengthen the inspection in early spring and scrape off the disease department in time, smear "tree general" lotion on the spot wound, sterilize and disinfect it, make the spot dry and fall off quickly, protect the wound healed healthily, and eliminate the source of disease. 4. Chemical control. Before the plum trees sprouted, the plum trees were sprayed with 1000 times of the liquid of "tree protection general" to wet the trunk and big branches, protect the branches and prevent the invasion of germs, spray once every 7-10 days, and control 2-3 times continuously. 5. Use cationic surfactant. During the dormant period of plum trees, the ring ligation technique of "Caohuawang No. 1" can be used to control plum gum disease, control shoot growth, improve fruit chromaticity and improve fruit quality. 6. Ditching and drainage in time in the rainy season. The root of plum tree belongs to the temperamental nature, so when planting plum trees on cultivated land, we must pay attention to timely drainage. The orchards that are prone to stagnant water should open a deep ditch of 30ml / 50cm, which is not only beneficial to the growth of plum trees, enhance the ability of disease resistance, but also reduce the humidity of orchards, inhibit the growth of bacteria, and achieve the purpose of disease prevention. 7. Harvesting technology. The fresh fruits in some plum producing areas are mainly used for processing plum billet or dried plum. The traditional habit of harvesting is to knock down the plum fruit with bamboo sticks and branches, causing mechanical damage to the branches and creating conditions for the invasion of bacteria. Therefore, it is necessary to advocate picking plum fruit by hand, which can not only improve the quality of fresh fruit, but also protect branches and reduce the chance of bacteria invasion.