The occurrence of apricot tree neck rot not only affects the yield, but also causes the death of apricot trees, and seriously affects the production and development of apricot trees. Apricot tree neck rot occurs mainly at the base of the apricot tree and is caused by a fungus. The pathogens overwinter in the soil with oospores. In the spring, the oospores invade the apricot branches, and they can also invade directly after the spore sacs are produced after the germination of the oospores.
To prevent and cure apricot tree neck rot, pay attention to the following points:
After the apricot tree is infected with neck rot, the cortex of the diseased part turns brown and rots, the sag is twisted, and the diseased part has no odor. In the corresponding upper part of the diseased part, the branches show late germination, weak growth, and if not treated in time, The leaves will be wilted, dry and the plants will die.
Apricot neck rot is generally prone to soil orchards, poor soil drainage, or excessive irrigation of intercropped vegetables, and extensive orchard management. The main neck has a wound or a graft interface that is buried in the soil and is also susceptible to the disease. If the new apricot garden is a vegetable field before the new apricot garden, it can be dug well before the planting, and disinfected with copper sulfate hole disinfection, about 10-15 kg per hole. The grafting interface should be 10-15 cm above the ground when planting. Renovate the drainage system of the apricot garden in time to ensure that no water is accumulated in the orchard during the rainy season. Immediately after the spring soil is thawed, the root and neck soil should be opened, the root neck should be dried, and the root cortex should be carefully inspected. The lesion should be scraped off in time, and then the wound should be coated with 25% of the bacterium 50-100 times or 40. % Ethyl aluminum phosphate 30-50 times, once every 7-15 days, usually 2-3 times is effective.
The diseased bark that has been scraped off should be cleaned and brought out of the garden to burn. Before the winter soil is frozen, the chopped soil is placed in the roots and necks to prevent freezing.
For orchards with serious diseases, 25% of toxic mycelium 800-1000 times or 40% of ethylphosphorus aluminum 300 times, each plant is irrigated with 45-50 kg of roots, which is used for the spread of disease-preventing bacteria. Roots, watering trees. If the dead tree should be dug in time, and disinfected with 40% Ethylphosphorus aluminum 30-50 times liquid, and dried in the soil, and then through soil testing, to determine the disease-free bacteria can re-establish a new garden.
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