With the adjustment of industrial structure, tomato in protected areas has developed rapidly. It is currently the peak period for the incidence of gray mold in tomato in protected areas. Therefore, according to the occurrence characteristics and development rules of gray mold, we summarized the prevention and control methods of tomato gray mold as follows: 1. Use resistant varieties. The tomato varieties with high yield, good quality, disease resistance, and strong stress resistance are selected, and at the same time, according to the cultivation characteristics of the varieties, good methods of good breeding should be achieved. 2. Heat sterilization. The soaking of warm soup can prevent seeds from spreading diseases; during the summer period of the shed, solar energy is used to make high temperature stuffy sheds to eliminate pests and diseases in the soil. 3. Cultivate disease-free strong seedlings. The use of factory plug tray seedlings, reasonable regulation of temperature and humidity, promote root development, enhance disease resistance, and cultivate disease-free strong seedlings. 4. Low-temperature hardening seedlings. The seedlings were planted 710 days prior to planting, and the greenhouse cover was covered with early cover to reduce watering, increasing ventilation volume and time, maintaining 20°C 25°C during the day, 8°C 10°C during the night, and 12 short periods of 5°C required work out. 5. Balanced fertilization. Re-apply organic fertilizer, increase potassium fertilizer, supplement micro-fertilizer. Balance plant nutrition and improve plant immunity. 6. Optimize the cultivation environment. Properly dense planting, prohibit flooded irrigation, the use of under-membrane irrigation, drip irrigation and other irrigation measures to reduce humidity. 7. The rotation is down. Tomatoes are planted with pods, and gray mold is severe. Rotation is advocated. The best planting modes are tomato-cucumber, fennel-tomato-cucumber and so on. 8. Regulate temperature and humidity. Through the control of temperature and humidity, we can create an ecological environment that is conducive to the growth of tomato and not conducive to the occurrence of gray mold. In the morning, the greenhouse temperature was raised to 31°C33°C, and the air was released at 34°C. When the temperature dropped to 20°C in the afternoon, the air vents were closed and 13°C and 15°C were maintained at night. To water in the sunny morning, immediately after the watering, close the greenhouse to raise the temperature, and suffocate for more than 1 hour at 33°C. 9. Clean the pastoral. When removing diseased leaves, use a plastic bag and remove them to prevent germs from spreading. After the harvest of tomatoes, the diseased plant residues, diseased fruits and weeds should be completely eliminated, and they should be destroyed and buried deeply to reduce the number of disease sources. 1 Lb Xylitol Bag,Wholesale Food Additive,Wholesale Bulk Xilitol Powder,Food Grade Bulk Xilitol Soar Biotech Co.,Ltd , https://www.xylitgum.com