Repeated infections of cherry blossoms occur frequently in the season, and the growth of cherry blossoms is greatly affected. The diagnosis of diseases mainly depends on the leaves, stems, branches, roots, and other aspects. 1. The leaves of cherry blossoms are glossy. In spring, the leaves are thick green, the green in summer, and the red in autumn. These are the performances of cherry blossoms. They also indicate that the cherry blossoms in the next year will be ideal. 2. 1 There are plastic symptoms on the trunk of the cherry tree. This phenomenon is not a disease. It is caused by moths drilling into the trunk to spawn eggs. It is necessary to use a knife to dig out the eggs and inject drugs, improve the soil, and strengthen water and fertilizer management. . 2 Many mushrooms and moss grow on the trunk, which indicates that many pathogens invade the branches of the cherry trees and should be cut in time, burned in a concentrated manner, reduce the source of the disease, and create conditions that are not conducive to the onset of the disease. 3. Observe the growth of cherry blossoms in the four seasons and find that the branches and leaves are not full (yellow leaves tend to fall, flowers bloom less, and the flowering period is short). This shows that there are problems in the roots. Generally speaking, it is a "root cancer" which is caused by the infection with Agrobacterium tumefaciens. The bacteria in the tumor cortex, or fall into the soil with the broken tumor debris, and use rainwater and irrigation water as well as underground pests and horticulture. The tool spreads and spreads through diseased seedlings for long distances. The bacteria invade the plants through various wounds. Usually the soil is wet and the water is accumulated. When the organic matter is rich, the disease is severe. The alkaline soil is beneficial to the disease. The tumor must be removed in time. The soil around the diseased plants can be used at 50 to 100 g/m2. Sprinkle the sulfur powder and disinfect it. The root and neck of the diseased plant can also be soaked and sterilized in 500 to 1000 times streptomycin solution for 30 minutes. The charcoal powder and microorganisms in the leaves are used to improve the soil. The treatment effect is better.