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Grape enlargement management
During the period of grape enlargement, grape berries grow rapidly after sitting on the fruit. When the fruit is near soybean, it is called the period of grape enlargement. This is the most prosperous period of vine growth throughout the year. It is also a critical period in the year-round production of grapes. Management is good or not, and it determines the yield and berry quality of the whole park. First, the management of shoots: For new shoots, leave 12-15 leaves to pick up the heart. If you have taken a topping before flowering, and you have a secondary tip, you will leave 1-2 tips at the tip of the new shoot. Each leaves 3-5 leaves topping and all others are removed. The tendrils on the new shoots are all removed from the roots. The new shoots are tied to the wire in a timely manner to allow it to stand upright and the distance between the new shoots should be even. All sick and dry old vines were cut off and cleared out of the garden. Second, the ear management: According to the growth of new shoots ear, the general law is: strong two in a weak do not stay. If a new shoot 3 ears, it must be cleared 1-2. If the ear is not tipped before flowering, it can be done at this time, and the spike tip is 1/5-1/4. It is necessary to eliminate the sickness, disability, and deformity. If grapes are planned to be bagged, this period is the best period and can be carried out quickly. Third, water and fertilizer management: grape enlargement period is the year of growth of grapes, the largest amount of water and fertilizer. At this time, topdressing fertilizers are mainly nitrogenous fertilizers, which are combined with phosphorus and potassium fertilizers. Generally speaking, for a garden with a planned yield of 2,500 kg per mu, the expanded fertilizer can be applied to 100 kg of ammonium bicarbonate or 35-45 kg of urea, plus 50 kg. Kilograms of potassium sulfate compound fertilizer. If there is a deficiency, trace amounts of trace elements may be added. After the topdressing, it is irrigated and then poured again every 6-7 days. Fourth, soil management: Each watering, after the soil is loose, protect the earthworms, and remove weeds in the field, with particular attention to the removal of high-stalk weeds. Fifth, pest and disease control. At this time, the grape shoots are in adolescence, and it is not a season with multiple pests. In case of rainy weather, gray mold and so on will occur. This period should be mainly to prevent disease, can be 1:0.7:200 times Bordeaux mixture as the main drug, interspersed or sprayed carbendazim, or chlorothalonil, or thiophanate-methyl. See the occurrence of disease, symptomatic spraying.