Sweet cherries are a tree species with poor resistance to stress and are not tolerant to low temperatures. They are suitable for growing in places with an average annual temperature of 10℃～14℃. Therefore, in areas with low winter temperatures and strong winds, it is particularly important to manage cherries in winter. In November, cherries enter a dormant period after deciduous. The cherry orchard management during the dormant period should do the following three points: Tree protection Whitening of trunks Whitening of trunks is generally carried out in early November. The composition of the whitening agent is slightly different from place to place, and can be adjusted according to local actual conditions. The commonly used whitening agent formula is: 10 parts quicklime, 30 parts water, 1 part salt, 1 part adhesive (such as clay, grease, etc.), 1 part lime sulfur mixture stock solution. Among them, quicklime and sulfur have bactericidal and insecticidal effects, salt and adhesives can prolong the action time, and a small amount of targeted insecticides can be added. The specific method is to first dissolve the quicklime with water, filter out the residue, pour in the dissolved salt, and finally add the lime sulphur mixture, adhesive, etc. and stir evenly. The whitening solution should be used with the preparation, and should not be stored for too long. The watering time is usually from late October to early November before the soil is frozen, and the amount of water is 50-100 cm after the water penetrates into the soil. In order to reduce the thickness of the frozen soil layer, postpone the germination period of the next year and prevent the damage of late frost, the tree can be covered with grass (wheat straw, straw, weeds, etc.) with a thickness of 10-15 cm. After covering the grass, surround the edge of the canopy Press the soil in place to prevent wind. You can also put a 100 cm wide mulch film on both sides of the tree after pouring the frozen water, and press it around with soil to maintain soil moisture, increase ground temperature, and strengthen root absorption. Bury and cultivate the soil to prevent cold and plant the saplings that were born in autumn. Before the soil freezes, bend the seedlings as close to the ground as possible, then cover the dry seedlings with soil, and bury them all tightly. In the spring of the second year, when the soil is thawed and the temperature stabilizes, the covering soil is removed and the seedlings are dried and straightened. For 2-3 year-old saplings, in areas with strong winter and spring winds, crescent-shaped ridges with a height of 50 cm can be cultivated in the north near the branches to prevent wind. The root and neck of cherries are vulnerable to freezing damage. After freezing damage causes the wound, it is conducive to the infection of bacteria. The cherry root neck rot disease that can cause cherry tree death in current production is closely related to freezing damage. For cherry trees in colder regions, the soil should also be cultivated in a tree tray. The soil should be cultivated 30-40 cm around the trunk so that the root neck is located below the frozen soil layer. In addition to preventing freezing damage, it can also prevent root neck rot. . Pay attention to the early spring after the soil has been thawed, it should be peeled in time to reduce the humidity of the root neck. Wrap the branches with plastic strips to prevent splintering, use plastic strips to wrap the entire branches from top to bottom, one circle and one circle, before the soil is frozen. Remove the plastic strips when buds begin to sprout the following spring. Newly planted young trees that year can be covered with long plastic bags on the branches, and the lower part should be compacted with soil to prevent stripping. When applying petroleum jelly, apply it from the bottom to the top. The application should be even and thin. Try not to apply it to the buds, so as not to affect the growth of buds. The above protective measures can be selectively adopted according to the local climate and your own cherry tree conditions. Winter pest control Cherries enter the dormant period after their leaves fall around November. In the severe cold winter, many pests that harm fruit trees are also in a dormant state, and many diseases enter the overwintering state in the form of hyphae and sclerotia. Using the winter slack time to pay close attention to the prevention and control of pests and diseases has a significant effect on reducing the occurrence and damage of pests in the second year. Early deciduous leaves caused by serious leaf diseases such as brown spot disease in autumn should be cleaned up in time after the leaves are deciduous, and burned together. At the same time, dead trees and diseased roots should be excavated, and the orchard should be thoroughly cleaned and burned. Correctly grasp the trimming time The xylem ducts of cherry trees are thicker and the tissues are soft. Pruning in winter during the dormant period or early spring is easy to lose water to form dry piles, which will endanger the sprouts of the cut or shrink down and affect the branch potential. The pruning period should be carried out after the sap flows and is close to germination. During this period, the meristems are active and heal faster. Disclaimer: Some articles on this website are transferred from the Internet. 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