Prevention of black spot of walnut

(1) Select disease-resistant varieties, reasonable planting density and reasonable pruning, so that the tree structure is reasonable, the branches and leaves are evenly distributed, and good ventilation and light transmission conditions are maintained.

(2) Strengthen fertilizer and water management, increase tree vigor, and increase disease resistance; promptly cut or remove diseased branches, diseased leaves, diseased fruits, peeled walnuts after peeling, concentrated burning or deep burying, and reduce the source of overwintering bacteria.

(3) To prevent and treat walnut pests and other pests in time, use clubs to knock as little as possible when picking fruit, avoid damage to shoots, reduce wounds, and thus reduce the chance of pathogen infection.

(4) Before the germination, the lime sulfur was sprayed carefully in the middle and early March. After germination, after flowering, and after flowering, 70% thiophanate-methyl and agricultural streptomycin sulfate can be sprayed, and sprayed every 15 days from May to July. Can be used with ethyl allicin, copper oxalate or 1:0.5:200 Bordeaux mixture and other agents to prevent drug resistance.

Vitamin

Another benefit of vitamins for the human body is that it can help the growth and development of the human body to operate normally, especially for teenagers, vitamins are one of the essential nutrients in the growth process. For example, vitamin D can well adjust the metabolism of some trace elements in the human body, and can also promote the absorption of calcium by the human body, maintain bone health, and maintain a balance between the blood phosphorus level and the blood calcium level in the human body.

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