1. Time scraping rough skin can be carried out in the dormant period of fruit tree deciduous to pre-emergence.
2. Object old trees, premature aging trees and young trees with old skins need to be scraped.
3. The part where the part needs to be scraped is the main part of the trunk and the main branch. The diseased trunk should be thoroughly and cleanly scraped.
4. The depth of scraping rough skin should master the principle of “redness and no whitenessâ€, that is, it is better to scrape the red endothelium.
5. After the treatment, the affected area should be coated with methyl thiophanate or 5 degree stone sulphur mixture or whitening agent (lime: water: stone sulphur mixture: salt = 10:36-40:2:1-2) to prevent the invasion of pathogens.
It is important to note that alpine areas must be scraped in early spring to prevent frost damage, and can be carried out throughout the rest of the period in other areas. When the pests in the orchard are serious, the coarse old skins (more pests and less natural enemies) in the upper part of the three main branches can be scraped off in winter, and burned or buried deeply; in the early spring of the next year, the rough skin of the three main branches and the main trunk will be scraped off in the early spring. .
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