Rust disease, also known as flower face disease, is a virus disease and one of the major diseases that harmed apples in recent years. According to the survey, 50% of the orchards have diseased plants, the rate of individual orchard disease strains reaches 40%, and the critical illness rate is 20%. Many farmers have treated the disease as a rust prevention and treatment result, which has aggravated the occurrence of the disease and caused economic losses. Rust disease is a viral disease. The diseased trees are poisonous and the virus can grow and multiply with the growth of fruit trees. Therefore, once the apple trees become ill, the condition will increase year by year. It is currently known that it can be transmitted by grafting; healthy trees and diseased trees can infect when in contact with each other; they can be spread by scissors and saws when trimmed; Control methods: 1. Seed propagation with seed sowing, avoid using root seedlings; scion from the diseased tree is strictly prohibited, to avoid seedlings near the old orchard, the establishment of disease-free nurseries, scion from the virus-free seedlings, which is to prevent rust The fundamental measure of disease. 2. Strengthen pest control and reduce transmission routes. 3. The diseased trees must be timely excavated and burned. 4. Avoid mixing apple and pear trees.
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