Tips for the management of big cherry trees in winter: one clear, two turns, three cuts and four defenses

Winter is the season of reserve for the spring growth of large cherry trees. Management is very important. It is mainly divided into five processes: winding up, turning over, pruning, disease prevention, and freezing prevention. Let me share with you: the winter big cherry tree enters the dormant period, growth stops or activities are very weak, the main points of winter management is to do Do the following five tasks:

Liquidation

After the fruits are harvested, the dead branches, fallen leaves, rotten fruits, and weeds remaining under the trees have become shelters for many pathogens and pests.

Therefore, personnel should be organized to clean up the pests from the fall of dormancy in autumn to before the pests emerge in the next year, and burn them together or compost at high temperature in the orchard.

Overturn

In winter, there are many fruit tree pests that live in the soil, such as peach heartworm, jujube stepworm and so on. For this reason, before the ground is frozen, the soil under the tree is turned over (25-35 cm deep), so that the pests that are overwintering in the soil will freeze to death outside the ground or be eaten by birds. It can also remove pests on the ground. Or the pests of the topsoil turn into the deep underground soil and smother it.

Plowing the orchard can not only improve the physical and chemical properties of the soil, but also help to kill the pests and diseases that overwinter in the soil, but it should not damage the roots.

prune

After one year of growth, fruit trees are easy to cause tree shape disorder. In order to form a good crown structure, prolong economic life, and achieve high-quality and stable production, deciduous fruit trees will be trimmed and pruned from late December to January in winter.

Generally, saplings and trees are cut lightly with vigorous vigor; senescent trees and weaker trees are cut again; pruning the trees at the peak fruiting period and medium vigor, and adjust the growth and fruiting of the following year.

Disease prevention

1. Spraying for sterilization, the spraying ratio is ferrous sulfate: quicklime: water=3:3:100. When spraying, spray it finely and evenly, and spray with the mix. ****** is sprayed at 8-10 am and after 3 pm.

2. Fruit trees planted in autumn, no matter the fruit seedlings for export, must pass the physical quarantine by the quality supervision department. All seedlings with pests and diseases will be destroyed, and only qualified ones can trade and cultivate them.

3. Mature fruit trees have rough bark, many cracks, and rough bark. These places are places for pests and germs to overwinter. Therefore, scraping the bark in winter can eliminate it intensively to reduce the density of insect population and the source of initial infection of pathogens in the coming year.

Antifreeze

1. The main stem of Sokcho. 2. Cultivate the soil on the tree tray. For fruit trees, use the main trunk as the center, and cultivate 10-20 cm of soil on the tree tray, but when the temperature rises in spring, the cultivated soil around the trunk should be removed to expose the root neck. 3. Whiten the trunk after scraping the bark. The specific formula is: 10-12 parts quicklime, 2 parts clay, 36-40 parts water, 2 parts lime-sulfur mixture stock solution or 5 parts stock solution residue, 1-2 parts salt , First hydrate the quicklime, filter out the slag, pour the dissolved salt, then pour the lime sulfur mixture and clay, stir evenly and coat the main trunk and main branches. The amount of coating is subject to non-flowing. 4. For evergreen fruit trees on a sunny day in winter, 0.5% urea solution or 0.3-0.5% potassium dihydrogen phosphate can be used for extra-root topdressing to increase the humidity of the orchard and increase the frost resistance. 5. In dry years in winter, the orchard with conditions can be irrigated from mid-December to early January.

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