Apple rot disease is the most common disease in fruit tree cultivation. Once a diseased plant is found, it must be prevented in time. Otherwise, it will spread to the whole garden quickly, which will not only affect the normal growth of apple trees, but also seriously affect the yield and quality of apples. There are many methods and drugs for preventing and treating this disease. Now, a simple method for controlling apple rot with salt water is introduced.
Prevention and control principle
1. The salt water has poor viscosity, strong fluidity, easy to coat evenly, easy to penetrate and has good effect;
2, 25% of the salt water is applied to the diseased sputum, and a thin layer of salt film is formed after the water evaporates. The hyphae cannot penetrate the salt film and invade the phloem; Co.,
3. The pathogens scattered in the salt film or invading the phloem tissue through the salt film, as well as the pathogens left in the diseased area, are dehydrated due to the high osmotic pressure of the salt and the strong water absorption capacity, thereby preventing the fruit trees from being invaded. , get protected.
Operation method
1. Cook brine. The salt is prepared into 25% salt water, put into a pot and boiled, and allowed to cool for use.
2, scrape the disease and apply medicine. In March, April or August, use a sharp knife to scrape all the diseased necrotic bark on the diseased branch of the apple branch, and extend it to the surrounding area of ​​about 1.5 cm, so that the scraped disease is surrounded by Healthy disease-free tissue. When scraping, the bark at the edge of the diseased edge is cut into a slope of 45° to 60°, so that the diseased sputum is jujube-shaped or elliptical, which is beneficial to the healing of the diseased sputum. Apply the boiled salt water to the scraped disease with a small brush. The range is more than two centimeters. Scrape one piece, apply one piece, and apply it again after two weeks. The application must be even and meticulous, and should not be carried out in a hurry.
3. Combination of prevention and treatment. In order to prevent the recurrence of rot disease, when the new disease is smeared every spring or autumn, the salt must be applied to the previous disease to achieve a thorough cure.
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