In the early stage of improper selection of drugs, the use of protective agents is not emphasized, and the protection of the leaves and other places is not in place, especially in the rapid growth stage of young tissues such as foliage and inflorescence. In the critical period of infestation or disease, the use of eradicants and therapeutic agents is not emphasized, and the bacterial potential in the garden is reduced. Recommendations: Commonly used protective agents are: copper preparations such as Bordeaux mixture, copper (King copper), mancozeb, zeocin (blue mer), pyrazoxime (yunbaotai), azoxystrobin (a Mida) etc. Commonly used eradicators: Dimethomorph (An wash, Gao Fu Shuai), Cyazofamid (Special), B Phosphorus aluminum (Reduction), etc. One of the important reasons why the grape downy mildew is not easy to cure is that it is prone to contain loopholes when fighting drugs, giving the chance of secondary recurrence. Therefore, for the prevention and control of grape downy mildew, special attention should be paid to careful and thoughtful. Adequate use of the drug with sufficient amount of water to ensure prevention and control without leaving corners is the key to medication. Suggestion: This stage of drug application, according to the lowest multiple of pesticide application, at the same time, choose a small electric sprayer, fine application, and increase the amount of water according to the number of leaves, to ensure that the water consumption per mu is about 100 pounds (normal density park). Cultivating the rain shelter to prevent misuse of rain can effectively shield rain from direct contact with the plants and delay germ invasion and morbidity. However, high temperature and high humidity conditions that do not reduce the number of pathogens and the incidence of grape downy mildew can be avoided by rain cultivation. The environment, especially the high humidity in the early stage, when the temperature is high and low, the hot and humid water vapor is not easy to spread, and it is more likely to cause a high temperature and humidity environment under the shed, resulting in serious recurrence of downy mildew. Therefore, if downy mildew enters the canopy, it will be more difficult to prevent and control than open land. This is why a lot of facilities under greenhouse cultivation conditions, grape downy mildew but more serious reasons. Products Of Livestock Reproduction Livestock Reproduction,Custom 18" Sanitary Sleeve,21" Sanitary Sleeve,New Design Sanitary Sleeve Jinan Mucho Commercial Inc. , https://www.muchovet.com