Hello, grape expansion period, that is, grape berries grow rapidly after setting fruit. When the fruit is close to the size of soybean, it is called grape expansion period. This is the most vigorous period of grape growth in a year, and it is also the key period of grape production throughout the year. Good management directly determines the yield and quality of grapes. How to manage?

First, the management of branches and vines:

The new shoot leaves 12- 15, and the core is picked. If the stone is picked before flowering and secondary branches appear, leaving 1-2 secondary branches at the top of the new branches, each stone has 3-5 leaves, and all others will be removed. The tendrils on the new shoots are pinched off from the roots. Tie the new tips to the wire in time to make them grow upright, and the spacing between the new tips should be even. Cut off all the sick and withered old vines and clear them out of the garden.

Second, the ear management:

According to the growth trend of new shoots, the general methods are: strong two, weak one, no left. If the new shoot has 3 ears, 1-2 ears must be removed. If you don't pinch the ear before flowering, you can pinch off the ear tip 1/5- 1/4 at this time. It is necessary to eliminate diseases, disabilities and deformed fruits. If you plan to pack grapes, this period is the best, so you can hurry up.

Three, water and fertilizer management:

Grape expansion period is the period when water and fertilizer are most needed in a year. At this time, nitrogen fertilizer and potassium fertilizer are the main topdressing, and seawater soluble fertilizer can be applied with seawater microbial agents to meet the needs of grape fruit expansion and branch growth. At this time, grape cells are constantly dividing, so we can spray Haisilkworm amino acid foliar fertilizer+powdered potassium dihydrogen phosphate when grape soybeans are small, so as to promote rapid cell classification and fruit expansion. Because the expansion period of grapes is the period of water and sugar accumulation in grape fruits, grapes need more water and nutrients at this time, and the supply of water and nutrients at this time must not be lacking. In addition, there is a great demand for some medium and trace elements in grape expansion period, such as calcium, boron, zinc, magnesium and other elements in marine products.

Fourth, soil management:

Every time you water, hoe a hoe when the soil is loose to keep moisture and remove weeds in the field, paying special attention to removing tall weeds.

Five, pest control:

At this time, the new shoots of grapes are in adolescence, which is not a season of frequent pests and diseases. In case of rainy weather, gray mold will occur. In this period, prevention should be given priority to, and Bordeaux mixture can be used as the main drug 1:0.7:200 times, interspersed or sprayed with carbendazim, chlorothalonil or thiophanate methyl. See a doctor and spray the symptoms.