2, plastic trimming. Winter pruning: generally 2 weeks after defoliation. Most pruning methods are short-shoot pruning, that is, only 2~3 buds are cut off from the branches of the current year at the fruiting part, and all the other branches are thinned out. The principle of pruning is to be as close to the trunk as possible to prevent the resulting part from moving out. When pruning, the dead branches, weak branches, too dense branches, etc. are thinned out, and the branches with appropriate positions and strong growth are reserved. Summer pruning: including bud wiping, shoot fixing, coring, secondary shoot treatment, tendrils removal and vine binding.
3. Flower and fruit management. Summer black grapes grow vigorously and have well differentiated flower buds. Most of the new shoots have more than two inflorescences. The cultivation of high-quality and high-quality summer black grapes generally follows the principle of 1 only one new shoot 1 weak new shoot without inflorescence) or three new shoots with two inflorescences. Sparse inflorescences that are too small, underdeveloped and endangered by pests and diseases, and sparse inflorescences can be combined with fixed branches on the frame surface.
4. Fertilizer and water management. Fertilization management: Summer black grape is a variety that needs a large amount of fertilizer. In order to ensure high yield year after year, we should pay attention to the use of organic fertilizer in management in order to improve fruit quality and obtain better economic benefits.
5, pest control. Pests and diseases that harm summer black grapes mainly include downy mildew, white rot, canker, ear stalk brown blight, gray mold, black pox, green blind stinkbug, etc., and the key period should be grasped in management for prevention and control.