At present, the strawberry facilities in the Beijing suburbs coincide with the seedling or seedling stage. At this time, it is the initial stage of strawberry powdery mildew before flowering, and it is also the key period for preventing powdery mildew. Prevention 1. Strengthen field management, reduce air and humidity, and create conditions that are not conducive to disease occurrence. Scientific water and fertilizer, increased phosphorus and potash fertilizers, cultivating strong seedlings and enhancing the resistance of strawberry plants to powdery mildew. 2. Remove old leaves, diseased leaves and sick bodies in time and bring them deep outside the shed. When the old leaves are removed, wounds are prevented from occurring at the roots, causing anthrax and other diseases to infect. Generally, it is better to leave 2-3 cm petiole in the upper part. 3. At present, the main cultivars in the Beijing suburbs are Japanese cultivars susceptible to disease, and they should be sprayed with a protective bactericide after their emergence. Can choose 80% of sulfur water dispersible granules 300-500 times, or 2% Wuyimycin water 200 times, or 4% NR 120 water agent 400 times, or 25% azoxystrobin suspension 1500 times Liquid, or mancozeb 1000-1500 times spray. After the onset, 50% of oxastrobin water dispersible granules can be used 2500-3000 times, or 70% thiophanate-methyl 1000 times, or 4% tetrafluoroether azole water emulsion 1200 times, or 10% diphenyl ether. Cyclozole dispersible granules were sprayed 1500 times. 7-10 days spray 1, even spray 2-3 times, the drug should be used for rotation. 4. In case of rainy days after deduction of membranes in the booth, it is possible to use 20% chlorothalonil-containing smoke agent 4/shed for smoking. Sulfur fumigators can also be used for conventional prevention in 4/sheds. Generally, they are selected to be heated and fumigated in a closed room for a period of 2-4 hours. Once every other day, it can be fumigated 4-10 times according to the actual situation. Fruit Jam,Mixed Fruit Jam,All Fruit Jam,Real Fruit Jam COFCO HEBEI INTERNATIONAL TRADING CO., LTD. , https://www.cofcohb.com