The main purpose of scraping the bark of fruit trees is to scrape off the pests or germs hidden in the bark, to achieve the purpose of controlling pests and diseases and rejuvenating the tree. However, because many people do not master the technical essentials, the effect of scraping the bark is not obvious. Therefore, it is necessary not only to grasp what kind of fruit tree to scrape, but also when to scrape the fruit tree and how to scrape it to achieve the effect.
What fruit trees need to be scraped
In general, the fruit trees are scraped out of the old and old skins, mainly for pears, apples, dates, chestnuts, peaches, apricots, plums, persimmons, etc., which have coarse and old skins and lesions for more than ten years. If it is not easy to scrape off the method of using suede or rubbing the bark.
When to scrape the fruit trees
Some people think that the earlier the scraping from the leaves to the flowering, the better, but this is not the case, usually after the soil is frozen and before the spring buds. The best time to scrape the skin should be carried out when the pest has not yet emerged, the natural enemies have been out of the scorpion activity or feathering, usually from November to February, which is the dormant period of fruit trees and pests. Does not affect the growth of the tree, but also can kill the pests and the net.
What part of the fruit tree is scraped
The reasonable scraping site of the fruit tree during the dormant period is determined by the wintering place of the pest on the fruit tree. Generally, it is mainly the rough skin and the warp skin below the main stem and the middle of the main branch. It is also necessary to observe the small shoots over one year old and not let go of a small disease, because mung bean-sized diseases can produce hundreds of millions of colonies. After the whole tree is scraped, it is necessary to repeatedly check it up and down to completely remove the sick body.
Pay attention to the method of scraping
When scraping the skin, use a special scraping tool to scrape the auxiliary branches, side branches, main branches and middle cadres of the fruit trees carefully and carefully. The most important one is to master the depth of scraping, the pear tree should be scraped to see the red endothelium, the apple tree should be scraped, and the persimmon, peach, plum, apricot, etc. are also suitable for shallow shaving. Gently scrape off the rough skin and do not scratch the white skin. Therefore, the depth is just as good as scraping the skin on the body, that is, the tree is white, the tree is green, and the disease is not scratched.
How to deal with the scraped skin
Most of the bark that has been scraped off has germs or eggs containing pests, so it needs to be treated instead of being discarded. After scraping the skin, combined with the winter to clear the garden, the branches, insect branches, dead branches, fallen leaves, fallen fruits and debris should be swept out of the garden and concentrated for destruction.
How to protect the tree after scraping
The method of coating white or spraying non-polluting pesticides forms a film on the tree, which makes the bacteria difficult to invade and infect, and the water of the tree is not easily lost. Use 1 kg of quicklime, 2 kg of salt, 0.2 kg of bean cake, add 3 kg of water, mix 50 g of animal and vegetable oil and mix well, then add 1 part of quicklime, 2 parts of sulfur, and 10 parts of water to make 0.5 kg of stone sulfur mixture. Formulated with a whitening agent, which can be applied to the scraped area.
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