First, strengthen ventilation, cooling, and dehumidification work in greenhouses. After mid-February, the light was sufficient, the temperature rose rapidly, and the vegetables entered a vigorous growth stage. The temperature in the shed was prone to exceed 35°C, which seriously affected the pollination, seed setting, and weakened plants. At the same time, the demand for water and fertilizer increased, the frequency of watering increased, the humidity in the greenhouse increased, and the disease increased. For this reason, ventilation and ventilation must be strengthened to adjust the temperature and humidity inside the shed. Around 10:00 am, when the temperature in the booth exceeds 30°C, ventilation should be carried out. During the operation, the air outlet should be from small to large, and it should be carried out gradually. At around 2:00 pm, when the temperature inside the booth is between 22 and 25°C, the ventilation openings should be closed to facilitate night-time insulation. At the same time as releasing the air, the water vapor in the shed is released to reduce the humidity in the shed and reduce the occurrence of diseases. Second, reasonable fertilizer management. During this period, the growth of vegetable crops was strong, and the demand for fertilizer and water increased. Cucumber generally 4 to 5 days a water, 10 days or so with topdressing urea 12 ~ 15 kg / mu, a total of two chase. Solanaceous fruits (tomatoes, peppers, and eggplants) are soaked in water for about one week. Fertilizers are topped every 20 days, and the application of three-element compound fertilizer is about 15 kilograms per acre. Note that watering should be performed in the morning on a sunny day so that the air humidity in the shed can be reduced when the air is released at noon. Third, timely prevention and control of pests and diseases. The major diseases that endanger the greenhouse vegetables are: downy mildew, epidemic disease, bacterial angular spot, leaf mold, gray mold, virus disease and so on. A broad-spectrum fungicide should be used for prevention and control. In the early stage of disease, special antiseptics were selected for timely prevention and treatment depending on the occurrence of diseases. Such as frost epidemic prevention and control of downy mildew, epidemic disease; Schmidt prevention and control of gray mold; Garrinong control leaf mold; streptomycin for agricultural control of bacterial leaf spot; virus Ning to prevent viral disease. If the above diseases occur at the same time, the above agents can be mixed and used according to the type of disease. Note that spraying should be done in the morning. In case of rainy weather, it is advisable to smoke sheds with smoke. The main pests that harm vegetables are: aphids and whitefly. The method of spraying and smoking should be used for prevention and control. Specific use of drugs: imidacloprid + le Dan mixed leaf foliar spray, smoked a net in the early evening closed after the shed smoked shed. Spraying and smoking are best at the same time. GMP ATS Injection, Tetanus Antitoxin, Tetanus Toxoid ,Tetanus Antitoxin Injection, Antitetanus, Refined Tetanus Antitoxinsupplier in China Tetanus Antitoxin,Tetanus Toxoid,Tetanus Antitoxin Injection,Antitetanus&Refined Tetanus Antitoxin FOSHAN PHARMA CO., LTD. , https://www.forepharm.com