Winter pruning of chestnut trees in winter should be arranged from mid-December to January of the following year. For chestnut trees that have entered the full fruit period, diseased insects, overlapping branches, vernal branches, Cross branches, dry branches, thin branches, and drooping branches are all cut off to improve the ventilation and light transmission conditions in the canopy, and at the same time, it is beneficial to concentrate nutrients and make the branch tips thick and full. The top branch and the extended branch of the backbone branch should be kept 50 cm for short-cut treatment, and the side branches should be promoted to increase the number of fruiting mother branches. At the same time, it is necessary to keep a part of the long branch in the crown or the middle and lower part of the large branch and cultivate it into a fruiting female branch. The fruiting female branch that has grown too much should be appropriately shortened to promote the lower part to shed new branches.
The pest control mainly kills chestnut tree weevil, and cleans up the damaged chestnut fruits and spiny bract shells in the orchard; clears dead leaves, residue waste and pruned shoots out of the garden and burns them intensively.
When scraping the skin, the underside of the trunk should be covered with plastic, and the rough skin, old skin, and warped skin should be scraped with a sharp knife and taken out of the park to be burned. After the skin is peeled off, the trunk and large branches are painted with white agent in time to prevent pests or germs from infecting the trunk.
Chestnut trees are susceptible to freezing damage in freezing winter, which is very detrimental to the wintering of the tree. Tree disc loosening and mulching should be carried out to improve the cold resistance of the tree and make it safe for winter.
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