A: In the summer, the diseases of grape seedlings should be prevented and the treatment should be supplemented. The grapes and grape seedlings should be sprayed once every fifteen days. For example, Bordeaux mixture and Baitai can protect the leaves. Increase the thickness of the blade. Secondly, the timely treatment, the summer rain and rain, high temperature and humidity in the case of grapes most susceptible, it is best to go to the vineyard once a day to observe. In the initial stage of the disease, timely and symptomatic spraying. Finally, loose soil in time. In summer, especially after a heavy rainstorm, the soil in the vineyard will be poorly ventilated, resulting in a lack of oxygen in the root system of the grape, weakened tree vigor, reduced resistance and susceptible to disease. Therefore, it is necessary to seize the time when there is no rain in the rainy season and loosen the soil in the garden in time to increase the permeability of the soil and isolate the source of diseases and insects.