What is fruit tree gum disease
The fruit tree gum disease is one of the most important diseases in the production of fruit trees, and it is mainly harmful to the trunk and main branches of fruit trees such as peach trees, plum trees and cherry trees. After a slight swelling of the affected area and a browning of the xylem, a transparent gel was secreted from the lenticels or the wound, and it gradually turned yellow-brown to brown in contact with the air and eventually turned into a black hard mass. The bark at the site of the disease is rough, cracked, and difficult to heal. In severe cases, the tree vigor is weakened and even the whole plant withers. Fruit tree gum disease mostly occurs in weak tree trees and large tree ages. Adhesive fluids are divided into physiological fluids and invasive fluids.
Physiological flow plastic: mainly occurs in the trunk and the main branch. After the rain, the gum comes into contact with the air and turns into a dark-brown, hard, amber-like plastic block. The diseased part becomes brown and rot when infected with saprophytic bacteria, which results in the weakening of the tree vigor. Severe persons cause dead trees, and the disease is heavy in the rainy season. Young trees are light onset.
Invasive flow plastic: the main damage stems. The pathogens infect the current year's shoots and invade the wounds and lateral buds. There are nodules around the lenticels. They do not shed fluids and have latent infection characteristics. The following year, the tumors are cracked and the glue overflows. A large number of spindle-shaped or round black spots are produced on the surface.
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