Botrytis cinerea mainly damages flowers and young larvae. The pathogenic bacteria invade from the top of flowers and young larvae. It is firstly immersed in water and soft rot. Burnt flowers land on stems and leaves causing rotten stems, rotten leaves, and gray mold. Low temperature and high humidity are the main conditions for the occurrence of Botrytis cinerea in cucumbers, especially when it encounters cloudy and rainy weather. There is insufficient light, and the temperature in the greenhouse is below 20°C. Humidity is high, many water droplets are formed, and the disease quickly spreads. Prevention methods are as follows: Remove diseased flowers, diseased melons, and diseased leaves in a timely manner after removing the diseased body, bring them out of the shed, and reduce pathogens. Pay attention to the temperature and humidity in the shed, and begin to let off the wind when the temperature of the shed is 30°C. Insulate the shed at 25°C. In the evening, cover the curtain insulation at 20°C. The chemical control was sprayed with 50% Suo Ke Ling 1500 times or 50% Hepronine 1000 times, spraying once every 5~7 days, and spraying 2~3 times. If it is cloudy or rainy, it should not be sprayed, change to aerosol fumigation, or use a chemical spray. Sodium Ethylenesulphonate,Surface Active Agent,Electroplate Glossy Agent,Synthetic Fiber Emulsifier XINGZHILIAN BIOLOGICALR&D CO.,LTD , https://www.xzlsdslds.com