After the grape was flooded, yellow leaves, fallen leaves, fruit drop, and fruit cracking occurred early. Soaking the roots in water for a long time caused the leaves to turn over, the winter buds germinated, the roots suffocated and rotted, and the whole plant wilted and died.
First, preventive measures
1. To prevent the orchard from being damaged, it is necessary to choose a garden when building the garden, do a good job of soil and water conservation and soil improvement, and if necessary, plant a trench and change soil. In rainy areas, terraces or deep ravines can be used to grow grapes to facilitate drainage.
2. Drainage equipment should be repaired in low-lying areas, and arable areas can be planted in plain areas.
3. Do not blindly use plant growth regulator products. During the rainy season, the vegetative pressure in mature grape fruits has increased dramatically. If external plant growth regulators are used, it may increase fruit cracking and cause grape quality to decline.
4. The conditional vineyards can adopt a rain-fence cultivation mode to prevent the occurrence of pest damage and reduce the occurrence of pests and diseases.
Second, remedial measures
1. To clear the channels, remove water as soon as possible. After the rain, the accumulated water from the vineyards was drained in time, the plants were righted, and the redundant water in the concentrated distribution layer was removed in time to solve the root respiratory problems. You can dig a 60-80 cm deep, 40-60 cm wide drain between every 2 to 3 rows of trees in the garden.
2. Timely cultivating and improving soil moisture. After flooding, the soil in the vineyard is easy to compact, causing root anoxia. Carry out deep-turning of tree trays or whole gardens to facilitate the distribution of soil moisture, strengthen ventilation, and promote new root growth.
3. Strengthen tree protection and actively prevent and treat pests and diseases. Can use 0.1% ~ 0.2% potassium dihydrogen phosphate or 0.3% urea solution for foliar dressing. After the tree potential is restored, the cooked manure and urine and cake fertilizers are applied to promote new roots. Before the rain as much as possible using Bordeaux liquid and other systemic protective agent, after the rain to the ground slightly dry, Bordeaux mixture and fungicides alternative use.
4 timely pruning, timely harvest. Cut off the broken vines in time to remove fallen leaves, fruit and rotten fruit. For trees with severe rooting, timely thinning, leaf cutting, and fruit removal to reduce transpiration and prevent plant death. For vineyards that have been flooded for a long time, they must be harvested in advance. The orchards that are lighter and unaffected should be graded and harvested in batches, and late-maturing varieties should be kept as early as possible.
5. Do a good job of keeping the cold out for winter. For buried areas and cold-proof areas, the thickness of buried soil is thicker than that of previous years when the buried soil is cold-proof, and the soil-taking part is far away from the roots to prevent the occurrence of grape frost damage.
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