What are the main diseases of grapes and their prevention?

1, grape anthracnose

Prevention and control measures: thoroughly remove diseased ears, diseased vines and diseased leaves to reduce the source of germs. In the south of the Yangtze River, flowers can be bagged immediately after withering. Strengthen cultivation management, timely rectify the school, tie vines and pick cores, and ventilate the shelf surface. Increase the amount of phosphorus and potassium fertilizer and control the amount of nitrogen fertilizer.

2. Grape white rot

Control measures: thoroughly remove diseased branches, diseased ears and diseased leaves. Trim in time, raise the load-bearing part, weed in time and pay attention to drainage. For plants that grow in vain, it is forbidden to apply nitrogen fertilizer before flowering.

3. Grape downy mildew

Prevention and control measures: removing fallen leaves, burying diseased branches or burning. Timely coring, pruning, drainage and weeding, and increasing the application of phosphorus and potassium fertilizer. Spraying should be started at the early stage of the disease. In the north, it is generally sprayed every 15 days from the first half of June.

Nutrition of grapes:

Grape is similar to most crops, and its growth requires about 17 kinds of nutrients: carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, chlorine and cobalt. Carbon and oxygen in bases come from carbon dioxide in the air during photosynthesis, while hydrogen comes from water in the soil.

Except nitrogen, most of the other elements are absorbed from the soil by roots, and the proportion is as follows: 94% ~ 99.5% of fresh crop tissues are composed of carbon, hydrogen and oxygen in air and water, and only 0.5% ~ 6% are from nutrients in the soil.

The above contents refer to:

Baidu encyclopedia-grapes

Baidu encyclopedia-grape pest control technology