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First, the main purpose of anti-freezing. Fruit trees such as pears, apricots, plums, peaches, and nucleus are susceptible to freezing damage, especially in low-lying areas. It is an effective method for anti-freezing in winter. In the beginning of November, for the 4 to 5 year old saplings that cannot be buried, whitewash the trunk, preferably to the main branch. Whitening cold-proof saplings can alleviate the temperature difference between the yin and yang of the trunk, and the cold-proof effect is better. It can be applied before the soil is frozen. The formulation of the whitening agent is: 0.5 kg of salt, 6 kg of quicklime, 15 kg of fresh water, and then added with a proper amount of adhesive and residue of stone sulfur mixture to make a paste, coated with young branches and old trees, after 11 The trunk is whitened from late February to late December. Sunny days can reflect the sun, reduce the absorption of solar heat, reduce the temperature difference before and after the freezing damage and the temperature difference between the day and night on the trunk, can prevent freezing damage.
Second, to prevent the spread of pests and diseases on the trunk for the main purpose. Whitening agent formula: 10 kg of quicklime, 1 kg of salt, 1 kg of stone sulfur mixture, 40 kg of water, and 0.2 kg of cooking oil. From the end of November to the middle of February of the next year, the old skin on the main trunk and the main branch will be scraped off. Pear trees should be scraped, and peach and plum apricots are easy to cause glue, carefully scraping. Li, pear, peach, and trunk with more than 10 years of age are more likely to be the wintering place for pathogens and pests. The whitening agent can prevent pests from invading the bark to lay eggs and phlegm, and kill pests and germs attached to the bark, and has the functions of antifreeze and anti-sunburn.
Precautions for use
1. The fruit tree whitening agent should be used as needed, and should not be put on for a long time.
2. When using, stir the whitening agent thoroughly to facilitate brushing and make the whitening agent adhere to the trunk.
3. Before using the whitening agent, it is best to cut off the diseased branches, weak branches, aging branches and dense branches with the branches of the forestry trees, then collect them for burning, and use plastics for cracking and cracking. The film is wrapped well.
4. In the process of careful inspection, if the harmful insects are found on the branches, the cotton pests should be used to kill the pests and then whitened.
5. When brushing, use a brush or grass to pick up the whitening agent. Choose the sunny day to evenly coat the base and main stem of the main branch. The white height is mainly 1-1.5 meters above the ground. If the old tree is renewed, in order to prevent sun exposure, the whitening position should be raised, or the whole plant should be painted white.
Precautions for preparation and use of fruit tree trunk whitening agent
Apply a whitening agent to the trunk of the fruit tree to prevent freezing damage, prevent the pest from overwintering on the trunk, and kill the pests and diseases on the trunk. The preparation method of the whitening agent is different depending on the application.
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