Characteristics of the disease The pathogens mainly lurk in the leaves, branches, and fruit disease tissues through the winter, especially autumn shoots are the main wintering sites. After winter, these pathogens become the main source of infection for the disease in the following year. In spring and autumn when the temperature and moisture are appropriate, the bacteria overflows from the lesions of the autumn shoots and spreads through wind and rain, insects, contact with branches and leaves, and agricultural operations, and invades through stomata, lenticels, and wounds. Long-distance transmission is mostly caused by the transport of infected seedlings, scions and fruits.
Control measures 1. Strict seedling quarantine and cultivation of disease-free seedlings. Seedlings and scion introduced from the outside, applied 700 units / ml streptomycin + l% alcohol immersion for 30 to 60 minutes, timely spraying a new high-fat film to form a protective film, anti-bacterial infection. 2, combined with pruning in winter and spring, completely clear the park. Immediately after the construction, the wounds were rubbed with anti-corrosion film to protect the growth of wound healing tissue, infestation with decay-resistant rot bacteria, soil protection, rainwater pollution, frost protection, and prevention of chapped wounds. Immediately afterwards, the whole garden was sprayed with general tree maintenance to suffocate the sterilizer, prevent virus replication and infection, and prevent various kinds of cortical disorders such as decay and ulcers. 3, wipe shoot control tip. Young trees: By controlling the tip of the shoots, the summer and autumn shoots can be punctuated. Young and young trees: Control the summer shoots by using buds to facilitate the protection of shoots. 4, protect the protection of fruit. When the shoot length is 1.5 to 3 centimeters, the first time the medicine is sprayed, the leaf is turned green, and then the second medicine is sprayed. The medicine is mainly ecologically promoted to promote Huawang No. 3; the adult result tree is mainly the young fruit. In the flowering, young fruit period, fruit expansion period of a strong fruit Tilin, can increase fruit pedicle, improve nutrition delivery.
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