1, apricot pruning time
The best time to prune apricot trees is winter, when apricot trees are dormant. Pruning them will do the least harm. Moreover, if you prune in winter, you can prune and update many branches and leaves, and the apricot tree itself has little effect. But if you prune in other seasons, you can't prune any more, because the healing ability is reduced, which will affect the growth of apricot trees, so it is generally light pruning.
2, apricot pruning method
Pruning in young trees: Apricot trees are mainly fixed and shaped in young trees. This stage is to form a complete tree and expand the crown. Apricot trees generally adopt a happy tree shape. First, keep the base trunk, then keep two or three trunks on the base, and finally form three, four and more branches on each trunk.
After the young trees are formed, it is necessary to adjust the crown of the young trees and continuously expand the crown, which can improve the fruiting rate in the fruiting period. At the same time, we also need to shorten and lengthen the branches appropriately, and sparse the excessively dense branches.
Pruning at the first fruit stage: the yield of apricot trees at the first fruit stage is generally not very high, but pruning branches is very important if you want to improve the fruit setting rate of apricot trees as much as possible. First of all, we only need to trim the irregular and messy branches and leaves and cultivate the growth of vegetative branches; The second is to cut off branches at all levels, keep the tree shape, and constantly expand the crown, make the best use of space and cultivate more fruitful branches.
Control measures of apricot stone scale
1, artificial control
Cut off the branches with insects and burn them centrally. It is also possible to wipe off the overwintering carved insects with straw stalks or rags from early March to late April, that is, after the overwintering nymph crawls out of the white shell until the female eggs do not dissolve.
2. Increase the application amount of organic fertilizer
It is suggested to apply more organic fertilizer when applying base fertilizer in September. Take apricot trees with full fruits as an example, each plant should be applied with 40~60 kilograms of decomposed organic fertilizer, which can be slightly adjusted according to the specific situation of its own orchard.
3, fungicide prevention
It is reasonable to spray fungicides for a long time to prevent hard scales of apricot balls, such as stone sulfur mixture.
4. Chemical control
If the damage of peach fruit borer occurs, the common pesticides are 48% Lethburn EC 1800~2000 times, 2.5% Deltamethrin EC 2500~3000 times or 10% Cypermethrin 1000 times.