Prevention and Control of Tomato Mildew

What should I do if tomatoes have mildew? This will greatly affect the growth of tomatoes. How can I better prevent and control it?

Tomato mildew prevention and control:

(1) Use healthy plants with disease-free fruits for seed preservation.

(2) Seed disinfection: Soak the seeds in clean water for 3-4 hours, then soak them in 10% disodium phosphate solution for 30 minutes, remove them, rinse them with clean water, and expose them to the sun for 3-4 days.

(3) After the disease occurs, remove the diseased leaves and branches promptly, and take them out of the field and burn them in a centralized manner.

(4) Strengthen field management. Dig deep drainage ditches around the fields, apply more organic fertilizer, and enhance the disease resistance of the plants.

(5) Chemical control. In the early stage of the disease, 1.5% phytopathogen emulsifiable concentrate at 800-1000 times dilution or 20% virus A wettable powder at 500 times dilution or 0.15% brassinolide at 7500 times dilution can be used for control. Use the medicine every 5-7 days for 3-4 times in a row. At the same time, focus on the control of aphids, because aphids are the main vector of viral diseases. 10% imidacloprid or 1.8% aphidine emulsifiable concentrate at 2000 times dilution can be used to spray the plants to control aphids.