After the grapes are harvested to the deciduous period, there are about four or five months of growing period for the tree to recover. Therefore, the management of grapes after harvest is still very important, mainly focusing on the following aspects.
Fertilization in autumn adopts ring furrow fertilization method for young trees, that is, digging a 20-30 cm ring-shaped fertilization ditch at the periphery of the main trunk 30-50 cm; for adult vines, the radiation furrow fertilization method can be selected according to the situation, that is, away from the main trunk. At 30-50 cm, open a shallow to deep groove in each direction. Generally, 3,000 to 4,000 kilograms of decomposed pig stent manure or 4,000 to 5,000 kilograms of high-quality soil and manure are applied to the ditch per acre, and then covered with soil.
Drought-resistant and leaf-preserving after harvesting, if the weather is dry for a long time without rain, it will cause premature death and shedding of leaves, which is not conducive to the accumulation of nutrients in the tree. When encountering autumn drought, pay attention to drought-resistant irrigation. If there are 10 to 20 days of dry and sunny days, irrigation is generally needed. Furrow irrigation and hole irrigation can be selected. Flooding, violent irrigation, and long-term irrigation are strictly prohibited.
The focus of pest control is to control downy mildew, powdery mildew, black pox and rust. Grasp the first spray after picking the fruit, and spray it every half a month thereafter for 2 to 3 times. The available agents are: 40% ethyl phosphorous aluminum wettable powder 300 times liquid, 60% zinc zinc powder 500 times liquid, 64% antitoxin alum 500 times liquid to treat other grape diseases. At the same time, 2.5% deltamethrin should be used to control a variety of pests such as scarabs, grape hawk moths, and two star leafhoppers.
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