Disease control of persimmon trees
According to your description, we can not determine what kind of disease it is. The following are the main diseases and insect pests of persimmon. I hope it will be helpful to you. The main diseases and insect pests are: Persimmon corner spot, round spot, anthracnose, scab, leaf blight, powdery mildew, eucalyptus moth, Japanese paramecium, tea yellow moth, oval tooth claw Gill beetle, red wax scale, brown belt roll moth, small black diamondback moth and so on. Control methods: ① to remove fallen leaves, burn, spray Bordeaux solution, Dysen zinc, carbendazim and other agents for several times at the initial stage of the disease, and spray strychnine when powdery mildew is serious. ② light traps and kills adults, larvae or nymphs spray dichlorvos, trichlorfon, fenitrothion and other agents.
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Shaping and winter pruning of persimmon trees
Persimmon belongs to light-loving crops. Close planting should pay attention to ventilation and light transmission, which is the main measure of high-yield management. Persimmon results in axillary buds, so it is very important to remove strong long branches and strengthen nutrition accumulation of branches and stalks. It is very important to pay attention to amino acid coating before flowering, promote flower bud differentiation, overcome age, and promote early hanging fruit.
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Soil testing and Formula fertilization Technology of Chestnut
1. The balance of the main branch (take the three main happy shape as an example). The main branch is the main skeleton that supports each branch. Before pruning, first take a closer look at the orientation and growth of the three main branches, and then adjust them after you have a good idea in mind. For strong and strong (large proportion of roughness) of the main branch, the angle can be enlarged, or the lateral branch can be used instead of the main branch to lengthen the head, combined with peeling.
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