1. Early coring and re-coring, the method is: 7 days before flowering, 2-3 pieces are reserved for re-coring before inflorescence, and 7 pieces are reserved for developing branches.
2. Spray boron during flowering, and spray 0.3% borax solution before flowering and in full bloom.
Do not apply nitrogen fertilizer before flowering, and it is better to apply it two weeks after withering.
4. Sparse inflorescences and pruning tops
In order to pursue high yield, many fruit farmers do not sparse inflorescences or pinch the tips of ears in summer, which makes the nutrient supply dispersed and the fruit size mature. When cutting in winter, cut lightly and put long, and leave more branches and vines, so that the fruit can move up quickly and the ear can be concentrated on the upper part of the shelf surface. Due to overload, uneven distribution and unbalanced nutrition, it is difficult to form high-quality fruits.
In order to improve the light conditions on the shelf, reduce diseases, promote flower bud differentiation and enrich the vines, the leafy vines should be pruned after the grapes are harvested. Sparse the vines on the upper part of the shelf, the weak branches on the lower part and the branches and vines in improper positions, reduce nutrient consumption, cultivate strong and robust fruiting vines, and reduce the air humidity under the shelf to avoid diseases.