How to manage Young Apple trees in Autumn

Young apple trees have strong growth potential, poor cold resistance and poor management, and are easy to strip after overwintering. The light ones had poor growth, disordered tree shape and delayed fruit. In heavy cases, the whole plant died, resulting in lack of plants, affecting the establishment of the garden. Such as strengthening the field management in autumn, promoting the robust growth of trees and enriching and maturing branches can effectively enhance their overwintering and prevent the occurrence of draining phenomenon. This paper introduces the main management measures in autumn.

1. Plastic surgery and pruning

1. Coring: from the first ten days of August to the first ten days of October, all the branches that have not stopped growing are coring, so as to control the growth of branches, promote the accumulation of nutrients, and make the branches grow full, robust and mature, which is conducive to safe overwintering.

2. Branch pulling: from early August to early October, in order to ease the tree potential and balance the branches and buds, on the basis of drawing branches in spring and summer, continue to pull branches with small angles and open angles. Generally, the angle of the main branch is pulled to 70-80 degrees, and the transport branch is pulled to 90-120 degrees. Note when pulling: first hold the base of the branch from the lower part with one hand, gently hold the base with the other hand, and pull down slowly to prevent the base from splitting, and the binding rope should be tied into a "loose mouth". Do not circle, do not bend the bow, do not drill into the ground, do not face up to the sky, and the branches are still a line.

3. Take the branch: from the first ten days of August to the first ten days of October, while pulling the branch and picking the heart, take the branch on the back of the main branch, the auxiliary branch and the prosperous long branch on the central stem, in order to change its growth potential and growth direction. Methods: apply a little force from the base of the branch from inside to outside with your hand, and squeeze the branch, so that the tissue of the branch is damaged, and the vascular bundle in the branch makes a "snapping" sound, but does not break the branch, and do not damage the leaf at the same time. The branches are horizontal or drooping after being taken.

II. Use of potassium dihydrogen phosphate and paclobutrazol

In order to promote the branches to grow fully, robust, mature early, and enhance the tree body and overwintering, after August, 0.3% of 0.5% potassium dihydrogen phosphate and 1000-2000mg/L paclobutrazol were sprayed every 10 rain 15 days, both of which could be sprayed at the same time for three times.

III. Control of Daqing leafhopper

When the cicada lays eggs on the fruit tree at the end of autumn, it causes a half-moon-shaped wound on the trunk, and the water is dispersed from the wound in winter and the following spring, which is easy to cause the branches to lose water and drain dry. From September 20 to October 20, dichlorvos was sprayed every 10 days, and the enemy killed 2000,3000 times of dichlorvos, or 2000,3000 times of Shuding, or pyrethroid pesticides, etc. Spray three times in a row to control the green leafhopper. It can also be painted on the trunk to prevent the green leafhopper from laying eggs on the tree.

IV. Timely application of base fertilizer

After the base fertilizer was applied in the first ten days of September, the wound of the damaged root system could heal quickly, the nutrients could be absorbed and utilized by the root system, and the nutrient storage of the tree could be increased. Each plant applied farm manure 50kg or so.

Fifth, cut off the water in time

No autumn water was irrigated from August to winter irrigation to promote the maturity of branches.