In the fall and winter season, as the temperature drops, the leaves return to the roots, the nutrients return, the photosynthesis and absorption of the tree cease, and the resistance drops. In addition, the trees in the dormant period lose the shade of the leaves, and the branches are exposed to the entire nature. In the middle, prone to frost damage and sunburn phenomenon, weakening the tree vigor, affecting the annual output, and even causing tree death.
Dormant trunk whitening not only can prevent sunburn and frost damage of fruit trees, but also eliminate a large number of pathogens and pests that overwinter on tree trunks. It is an important measure for pest control and tree protection in dormant fruit trees.
The proportion of whitening agent is: 10 parts of quicklime, 2 parts of lime sulfur, 1-2 parts of salt, 2 parts of clay and 35-40 parts of water. It is best to use white for 2 times. The first time after defoliating the fruit trees until the soil is frozen, the second time is in early spring.
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