One is whitening and scraping. When painting white, there must be no omission. If the orchard is closed, it is best to deepen the whole garden. After it is turned over, sprinkle the enemy powder with 4 pounds per acre to kill the larvae and golden worms in the soil. The second is "Sanjiu" urination. At the coldest time, dig a 1.5-meter-diameter hole around the trunk of the big tree trunk to reveal large roots. Each big tree is poured into human urine 1 to 2 kilos to kill the tree at the root. In the skin, the winter-grown aromatic wood moth and the walnut stem and weevil are very harmful. These two kinds of pests are very serious and often cause the death of the walnut trees. However, they are most afraid of human excrement. They use human excrement to death.
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