Grape disease prevention and control points

After the grapes are picked, there is a long period of time before the normal deciduous period. The quality of autumn and winter management is directly related to the level of fruit set in the second year. If improper management measures are taken, the nutrient reserve will be reduced, the branches will not be full, the tree will be weak, and the cold resistance will be poor, causing the fall of flowers in the next year. Therefore, the following measures should be taken to strengthen orchard management for high yield and quality.

1. Prevention of pests In late autumn, grapes are susceptible to downy mildew and leaf blight, resulting in early defoliation that must be prevented. The control of downy mildew can be sprayed with 600-800 times of 90% aluminum alfa. At the same time, it can be combined with 0.2%-0.3% of potassium dihydrogen phosphate for foliar application. It is sprayed every 10 days for 2 or 3 consecutive times. When grape leafhoppers are harmed, they are usually treated with oxidized dimethoate at 1000 times.

2. The best period of application of basal basal fertilizer should be performed after fruit picking, and should be sooner rather than later. Because of early application of energy to quickly restore tree vigor, it is conducive to grape overwintering and growth results in the coming year. On the other hand, early application of basal fertilizer in the autumn, the higher ground temperature is effective in the decomposition of organic fertilizers, the new roots of the cuts heal quickly, and new roots can be quickly grown. The second peak of grape root growth is from August to September. It is consistent with the law of root growth and absorption.

3. Clearing the leaves of the deciduous disease in winter and clearing the damaged leaves to reduce the source of the disease. First spray the garden with 3% ferrous sulfate, and then use 3% pentachlorophenol Najiabomei 3 to 5 degrees lime sulfur agent to conduct comprehensive spraying. Clearing the poison. It is also possible to withdraw the ground with 1 part of thiram, 2 parts of sulfur powder and 2 parts of lime powder, or sprinkle 50 kg of lime per hectare. It can effectively reduce the incidence of plants in the coming year.

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