Diseases and Management of Cherry Blossom

1. Cherry leaves have luster, spring leaves green hypertrophy, summer evergreen, autumn red, these are cherry growth robust performance, but also shows that cherry blossoms in the second year will be ideal.

2.① There is gum flow symptom on the cherry trunk. This phenomenon is not a disease, but caused by moths drilling into the trunk to lay eggs. It is necessary to dig out eggs with knives and inject drugs in time. Meanwhile, improve the soil, strengthen water and fertilizer management and prune reasonably.② There are many mushrooms and moss growing on the trunk, which indicates that there are many germs invading the branches of cherry trees, which should be cut off in time, burned intensively, reduced the source of disease, and created conditions unfavorable to the incidence of germs.

3. Observation of cherry growth in four seasons, found that branches and leaves are not luxuriant (yellow leaves easy to fall early, less flowers, short flowering), which indicates that there are problems with its roots. Generally referred to as "root cancer," it is caused by infection with Agrobacterium tumefaciens, which overwinters in the tumor cortex or in the soil with ruptured tumor remnants, spreads by rain and irrigation water, underground pests and gardening tools, and spreads over long distances by infected seedlings. Pathogens invade plants through various wounds. Usually, the soil is wet and accumulated. When organic matter is rich, the disease is serious. Alkaline soil is conducive to the disease. The tumor should be removed in time. The soil around the diseased plant can be disinfected by sprinkling sulfur powder at a dosage of 50 to 100 grams per square meter. The root neck and root of the diseased plant can also be soaked in 500 to 1000 times streptomycin solution for 30 minutes. The soil can be improved by using rotten leaf soil charcoal powder and microorganisms. The treatment effect is better.

Autumn Cherry Tree Management

1. Disease control and leaf protection Cherry leaves are susceptible to powdery mildew, brown spot, coal pollution and other diseases. If the control is not timely, it will lead to premature shedding of leaves and affect nutrient accumulation, which will be unfavorable for flowering next year. 70% thiophanate-methyl 1000 times solution and 65% zebrazine wettable powder 500 times solution can be selected and sprayed once every 15 days. Dichlorvos should be avoided as far as possible, so as not to cause defoliation. Appropriate watering and increased foliar fertilizer application (0.3% to 0.5% urea, 0.3% potassium dihydrogen phosphate) to ensure complete, thick and green leaves.

Second, the autumn base fertilizer is generally applied in early September, when the fertilizer has sufficient time to decompose, so that the tree can absorb and utilize before dormancy. At this time, the roots cut off by fertilization can heal quickly and germinate a large number of absorbing roots, improving the absorption and utilization rate of fertilizer by trees. Fertilization type is mainly decomposed farm manure, with a small amount of chemical fertilizer. General sapling soil fertilizer 50 to 75 kg per plant, autumn fertilizer should not be too deep, 40 to 50 cm is appropriate. Young trees can be used ditch method, healthy trees using the method, such as found that the tree has a deficiency disease, can be appropriately mixed with a small amount of trace elements.

Third, deep turning of the tree disk before the arrival of the root growth peak of cherry blossoms in autumn, combined with the application of base fertilizer, deep turning of the tree disk can increase the amount of deep roots, store water and preserve moisture, and improve the ground temperature. Clean up dead branches, fallen leaves and weeds in the tree tray and burn them in a centralized manner to eliminate overwintering insects and bacteria.

IV. Autumn pruning combined with the growth status of trees, timely thinning dense branches, cross branches, overlapping branches, pest branches, improving ventilation and light transmission of tree crowns, and enhancing tree vigor. Clean the wound with a sharp knife, disinfect it with a 5-degree solution of sulfur, and then apply tung oil and other protective agents to prevent wound decay.