First, scrape the skin object. Fruit trees such as pears, peaches, plums, grapes, chestnuts, walnuts, apples, plums, etc. are prone to produce rough skin. Adult trees above 10 years of age must be scraped. Scrape the rough bark and cracks on the stems and stems; scrape off the rot and ring disease.
Second, scraping time. Scrape should be carried out at the beginning of winter and early spring, that is, when the temperature begins to rise, pests and germs have not yet started to move. Do not scrape the skin prematurely, otherwise the tree nutrients will be lost and the fruit trees will be safely overwintered. The skin is shaved once every 2 to 3 years.
Third, scraping skin depth. Scrape can only scrape off the main skin and main branches completely corked rough skin, split skin and the residual skin at the cut and branch fork, depth is not white to be appropriate, to avoid damage to the endothelial layer. The thick skin of the pear tree can be properly shaved, and fruit trees such as peaches and apricots must be lightly shaved. For those with stronger tree vigor, you can scratch more, and those with weaker vigor should shave more.
Fourth, white after shaving. After scraping the skin, it is painted with a whitening agent to kill pests and germs, while reducing the incidence of sunburn. The formulation of the whitening agent is water: quicklime: lime sulfur stock solution: salt: fat is 40:10:2:2:0.3. First open the lime, pour the oil, add water into the lime milk, then add the lime sulfur and salt.
V. Other matters. 1. Plastic film should be placed under the canopy when scraping the skin so that the scraped dander and insect body can be collected, burned or buried deeply. 2. The whitening agent should be filled with non-metallic containers, and should not be filled with metal containers to avoid chemical reactions. Whitening agent should be used with the distribution, not long-term existence.
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