To prevent apple rot disease, we must strengthen the cultivation and management, enhance the ability of the tree to resist disease; timely cure and treat lesions, and carry out chemical control; do a good job in clearing the garden and reduce the source of disease. Only four seasons comprehensive measures can receive good results.
Spring: Before germination of fruit trees, apply fine bactericides (such as Kangjian, etc.) to the rot disease spots and 2-3 years raw branches that have not been healed in the fine scraping treatment, and then apply the healing agent or sealing shear oil after the dried medicine. Wait. This will not only prevent the disease, but also promote the wound early recovery. Then the entire tree is sprayed with bactericidal agents (such as Kangjian, etc.), and the main branch is sprayed more than 3 meters. Spring defense is a key to preventing rot.
Summer: The orchard with severe disease or adjacent to the severe disease garden will be painted with the same liquid spray as the spring for 1 or 2 times on the main branch, trunk and the lower part of the branch (particularly on the branch and wound).
Fall: Check the hidden parts, wounds, and branches of the major branches one by one in the whole garden. The diseased ones are immediately scraped or cut off. The treated wounds are coated with bactericide one to two times, and then the healing agent is applied.
Winter: In conjunction with winter cutting, do a good job in clearing the garden, clear the dead trees, dry branches, excavation of dry piles and dry stubble, scrape off branches and old skin and disease skin. The diseased branches and diseased skin are cleared out of the orchard and burned in time to reduce the density of germs. Whole tree spray 1 germicide (such as health, etc.). Cut out the mouth should first be coated with a liquid, dry and then use the healing agent protection.
In order to prevent human-induced spread of germs, special scissors are required. At least two scissors are used in one garden, and scissors that have cut off the branches are not cut and immediately disinfected, so that tools such as scissors and saws can be disinfected once. When the diseased trees are scraped and treated, the management of fertilizers must be strengthened, organic fertilizers must be added, and nitrogen fertilizers should be used less in order to increase the disease resistance of the trees.
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