Since August, the weather has been rainy and stuffy, and the downy mildew of grapes has become so serious that how to fight drugs cannot be controlled. What is going on here? What methods and agents can be controlled as soon as possible? From the point of view of prevention and control of the entire disease, it is necessary to implement a variety of measures that complement each other. However, the current grape downy mildew has been a serious outbreak, pharmaceutical control is the most important measure, according to the disease conditions, grape growth and weather conditions, choose a more appropriate agent and its formula is the core, but also pay more attention to spray quality. Flexible selection and matching of agents depending on the disease conditions: The leaves have been severely affected and need to be quickly controlled. The new type of bactericides mainly based on therapeutic therapeutics are mainly mixed with protective bactericides: fluopyram + promecarb + mancozeb , Or fluopicodate + propamocarb + azoxystrobin, 5 days later spray Bordeaux mixture + dimethomorph. The disease is not very serious, and it requires stable and continuous control. The main bactericidal agent is a Bordeaux mixture (preferably a commercial preparation) + inophycarb or cymoxanil, and after 5 to 10 days, azoxystrobin or pyrazolone is sprayed. Bacterin + dimethomorph, flumorph + mancozeb, or other therapeutic fungicides. Note on dispensing liquid: The high concentration does not mean that the efficacy is high. The dilution factor should be determined according to the type and performance of the sprayer and the growth of the grapes. The traditional high-pressure sprayer (machine) needs more water to ensure high coverage. Rate, the dilution ratio is larger, generally according to the product specification or technical regulations required to dilute the preparation, for example, 80% mancozeb is diluted by 1000~1200 times; the sprayer of mist sprayer or modern orchard air-feeding sprayer has better quality Some, the amount of liquid on the unit surface is relatively small, the dilution factor can be smaller, 80% mancozeb is diluted 600 to 800 times. In addition, first a small amount of hydration to open a preparation and then poured into the next preparation to open, it is not appropriate to mix after several preparations are stirred. Note the level of atomization and coverage: pesticide production, blending, and spraying actually use the least amount of water to spread the drug as much as possible and cover the leaves or young fruit, because the distribution of germs on the plant is scattered Only the liquid medicine completely covers all the leaves and fruit surfaces on the whole plant will have a better control effect. Therefore, fight drugs must be sure to get a uniform spray, cover it well. The small amount of liquid medicine equipment is not good, often uneven spray, a large amount of liquid spray a long time but will make the liquid has reached the leaf surface flow down, the final effect will not work. According to the performance of the device to master and use. Add spreading agent to increase coverage: After the liquid is prepared, add the silicone auxiliary agent in the liquid before the injection to promote the better adhesion of the liquid to the foliage and improve the effect. Try to avoid hitting drugs in the evening: fight as much as possible in the morning to ensure that the leaf fluids on the leaf surface and the fruit surface dry before the sunset. On cloudy days or in the evening, the leaf liquid on the leaf surface can not form a film and agglomerate into large drug droplets, or the effluent falling into the ground can not be effective or cause phytotoxicity. Reasonable use of copper preparations: Copper preparations, especially Bordeaux liquid, copper calcium sulphate, are very good bactericides, have better effect on downy mildew, and have a long duration of validity, but should not be used continuously, and should not be on the foliage or fruit surface. It is used when there is water drop (dew drop, raindrop). In addition, improving the ventilation of the orchard, or increasing the density of the leaf epidermis, can also effectively reduce the disease. Organic spirulina powder is extracted from 100% natural spirulina. Spirulina is neither an animal nor a plant, it is actually a natural freshwater alga. Its protein content is incredibly high. It also contains iron, vitamin B6, and several other micronutrients. Ensuring that micronutrient intake is maintained is very important to ensure optimal physical condition. Organic Spirulina Powder,Organic Phycocyanin,Bule Spirulina Powder,Organic Spirulina Tablets Organicway (xi'an) Food Ingredients Inc. , https://www.organicwayince.com