Skillful topdressing: topdressing 3~4 times a year, and topdressing nitrogen fertilizer before and after germination for varieties that are easy to set fruit. Spraying Guaguozhuangdiling before flowering, young fruit stage and fruit expansion stage can prevent the phenomenon of falling flowers and fruits caused by unfavorable climatic conditions, thicken the nutrient transport conduit of grapes, improve the fruit expansion speed and increase the color.
Flower and fruit management. Sparse redundant inflorescence: When the vines are heavily loaded and there are too many inflorescences, the weak inflorescences with poor development and inflorescences with dense distribution or improper position are sparse to concentrate on supplying nutrients. Sparse inflorescences can also be thinned from before flowering to when flowering on the basis of pruning.
Sparse panicles: In order to further reduce unnecessary nutrient consumption, spare panicles or grains should be thinned as soon as possible.
Fruit and vegetable grains: from the fruit-setting stage to the hard-core stage, seedless small fruits with poor pollination and fertilization and fruit grains with too tight ears are thinned out. According to the size of fruit grains, the suitable spacing between grains is determined. There are fewer fruit grains in large-grain varieties and more fruit grains in small-grain varieties.
Key period of pest control: chemical control: spraying sulfur mixture before germination+general tree protection, disinfection and sterilization, effectively controlling grape black pox and red spider and other pests and diseases; During the peak period from July to August, the prevention and control of pests and diseases should be strengthened, and the whole garden should be sprayed with Bordeaux mixture, which has good effects on grape white rot, downy mildew, anthracnose, leafhopper and so on.
Fruit bagging: Grape bagging can obviously improve fruit quality, prevent diseases and insect pests and reduce pesticide residues. Generally, the bagging period begins immediately after fruit setting is stable, heading and grain thinning are finished, and ends before the rainy season to prevent early infection and sunburn. Before bagging, the orchard should be fully sprayed with fungicides, especially the fruit ears, and then bagged after the liquid medicine is dried. If there is no bagging condition, 400 times of new high-fat film emulsion can be sprayed on the surface of grape fruit in the young fruit stage, similar to micro-film bagging, which improves the grape grade and increases the yield.