Applying a whitening agent to trunks of fruit trees can prevent freezing damage and prevent pests from overwintering on tree trunks and kill pests and diseases on tree trunks. Due to different uses, the method for preparing the whitening agent is not the same. First, to prevent freezing for a total purpose. Fragrant pears, apricots, plums, peaches, and nuclear fruits are vulnerable to freezing damage, especially at low-lying areas. Applying a whitening agent to trunks every winter is an effective method for preventing freezing. In early November, the 4 to 5 year old saplings that cannot be buried will be painted white on the main trunk, and it is best to apply it to the trunk bifurcation. Whitening and anti-cold sapling whitening can ease the temperature difference between the yin and yang surface of the trunk. 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 quick lime, 15 kg of clear water, and then add the appropriate amount of adhesive and lime sulfur residue into a paste. After coating the young branches and scraping the old trees, in 11 The trunk is whited from late-late to late-December. Sunny day can reflect sunlight, reduce the absorption of solar heat, reduce the temperature difference before and after frost damage, and the temperature difference between day and night on the trunk to prevent freezing damage. Second, in order to prevent pests overwintering on the trunk as the main purpose. Whitening agent formula: 10 kg of lime, 1 kg of salt, 1 kg of lime sulfur stock solution, 40 kg of water, plus 0.2 kg of cooking oil. From late November to mid-February, the old skin on the trunk and main branches will be scraped. Pear trees should be re-scraped, peaches and plums can cause plastic apricot, scratch. Lee, pear, peach, trunk split skin, and flaking skin are more than 10 years old, and they become wintering sites for pathogens and pests. The brush whitening agent can prevent pests from invading the bark to lay eggs and phlegm, killing the pests and germs attached to the bark, and has the functions of antifreeze and anti-sunburn. Use caution 1. The fruit tree whitening agent should not be used for a long time. 2. When using, mix the whitening agent thoroughly to facilitate smoothing and make the whitening agent tightly adhere to the trunk. 3. Before using the whitening agent, it is better to cut the branches of the trees in the forest garden with branches, weak branches, aging branches, and dense branches, then collect and burn them, and use the plastic in the cracks and cracks. Film bandage is good. 4. In the course of a careful inspection, if any insect pests have been found on the branches, use a cotton drench to kill the pests and then apply the whitening treatment. 5. When brushing, use a brush or a straw to draw the whitening agent. Select the base of the main branch and the main trunk to be painted white on a sunny day. The height of the white coating is mainly 1-1.5 meters from the ground. If the old trees are updated, in order to prevent the sun, the whitening position should be increased, or the whole plant painted white.
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Preparation and use of fruit tree trunk whitening agent