How to treat the rotten grapes?

According to your description, it may be grape white rot, which is one of the most important grape diseases, especially in rainy years, which is often prevalent with anthracnose. Grape white rot can damage ears, branches and leaves. After being invaded, the ear and rachis became light brown and rotted in water, and the whole ear or part of the spikelet fell off. The invaded fruit began to turn into light brown soft rot, and after 4 or 5 days, the grains were covered with small white grains, which was the conidia of the pathogen, and the diseased fruit was easy to fall off or lose water to become a stiff fruit. The young fruit was dry and withered after being invaded. New shoots and leaves can also be infected, but they are not common in the field. Prevention and treatment methods: 1. Clean up the pathogens. After unearthed, spray 200 times pentachlorophenol sodium to eradicate germs. 2. Improve the layout of the shelf surface and improve the result position. The ears within 40 cm near the ground are hoisted or bagged. 3. Carry out the work of picking the heart and removing the auxiliary shoot in time, and pay attention to the drainage in the rainy season and weeding in the field. 4. The ground under the shelf is covered with black plastic film. After falling flowers, the plastic film covers 60% of the vineyard. Film mulching can isolate the bacteria in the soil and play the role of soil moisture conservation and grass control. 5. Strengthen chemical control: spray every 15-20 days from pre-flowering to pre-harvest. The control effect of 75% chlorothalonil 600 μ m 800 times is the best, and the control effect of 1-type Bordeaux liquid is also good, which should be used alternately.