Use of tree dormancy to prevent pests
After clearing litter of deciduous trees, timely cleaning or burning of dead branches, fallen leaves, and weeds of the pests will be carried out, which will help reduce the number of pathogens and pests that pass through the winter.
In the cultivating forest soil, the former cultivated woodland can not only protect the soil by loose soil, accumulate rain and snow, promote the growth of roots, but also can turn the remaining litter into the soil, and at the same time turn over the wintering pests in the soil to the ground. Preyed by natural enemies or frozen to death.
In the early winter or early spring, the bark is treated to scrape off the old cracks, diseased skin, insects, etc. at the branches, branches, and stem branches, and burn them centrally or deeply.
After the tree trunk is coated with white fallen leaves, whitening agent can be used to whiten the trunks and the bases of large branches to eliminate pests that overwinter over the trunks and prevent sunburn and freezing injury. The whitening agent can be prepared by using 25 parts of water, 10 parts of quicklime, 1 part of lime sulfur, 1 part of salt and a small amount of animal oil.
Spraying and controlling the trees after deciduous and before germination, each sprayed with 5 Baume degrees of lime sulfur plus 200 times of sodium pentachlorophenol, has the effect of eliminating overwintering pathogens and eggs, and reducing the harm of diseases and pests in the following year.
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