Sheltered Cucumber Disease Prevention and Control The variety of cucumber diseases in the greenhouse is large, spreads rapidly, and the damage is serious and difficult to control. However, we have obtained some practical and effective experiences through a three-year comprehensive protection experiment against cucumber diseases in greenhouses. The specific requirement is to strictly control the "five customs." The first is that seed treatment is the main source of disease infestation and must be disinfected. To prevent cucumber yellow leaf disease, use 10% sodium phosphate solution to soak in water for 20 minutes; prevent cucumber anthracnose, disease, etc., soak in seeds in 1% formalin solution for 30 minutes, and wash and dry after dipping. Or pre-soaked with cold water for 4 to 6 hours, then immersed in warm water of 49 to 50°C for 1 minute, and then placed in 55°C constant temperature water for 5 to 7 minutes. To prevent bacterial blight of cucumber, use 40% sodium chloride 20 times liquid soaking for 20-30 minutes, or use 70% calcium chloride 300-500 times liquid soaking for 30-60 minutes. After immersion, rinse with water. It should be noted that: soaking the seeds with a solution of about 5 to 10 centimeters is preferable for immersing seeds, and do not stir during soaking, so as not to affect the suffocation effect. The second is the high humidity environment in the greenhouse, which is the main factor for high incidence of cucumber downy mildew and other diseases, so reduce the humidity within the greenhouse, maintain the air humidity in the greenhouse under 83% for about 4 hours, can effectively control the downy mildew Disease occurs. There are two methods for preventing moisture: artificial ventilation and blowing “dry hot airâ€. The third is high temperature stuffy shed when the shed temperature is between 20 ~ 30 °C, it is easy to cause cucumber downy mildew, anthrax, sclerotinia and other pathogenic diseases, so artificially control the temperature inside the shed A certain range above 30 °C, and maintain for a period of time, can effectively inhibit the spread of the above diseases. The method is: about 40 days after transplanting, close the greenhouse door and side tuyere measures, every 1 to 3 days for a high temperature stuffy shed, the time is generally around noon, the maximum temperature within the shed is controlled at 40 ~ 47 °C, and For about 2 hours, the temperature above 42°C should be maintained for at least 1.5 hours, and the temperature above 45°C should be maintained for more than 1 hour. Fourth, the smoke prevention and control of the disease through the actual application shows that with Bacillus Qing as the main ingredient of the fumigation agent - a smoked Ling, greenhouse fungal diseases such as downy mildew, powdery mildew, anthrax, etc., control effect can be Up to 82% to 100%. Technical points: It is usually done in the evening, once every 12 to 16 days, 3 to 4 consecutive times. Each space of 30 meters in length, 6 meters in width, and 2.5 meters in height is required. In the shed, evenly suspended with 30 grams of a smoked spirit with aluminum wire, 4 or so smokers are ignited from inside to outside, and they leave the shed and immediately shut down. All doors and side vents are sealed to prevent smoke from seeping. The next day you can work in the shed. The fifth is spray disease prevention In general, cucumber wilt disease, powdery mildew, downy mildew disease, the incidence of the beginning with 3% agricultural resistance 120, Mushi 75 kg 200 times liquid, sprayed every 6 days, continuous 2 ~ 3 times, or 90% of aluminum diphosphorus 700 times, or 58% of toxic manganese zinc spray 800 to 1000 times, have a higher control effect on cucumber diseases.
Vitamins Feed Grade Meal,Water Soluble Vitamin,Vitamin Mineral Water,Poultry Feed Grade Vitamin
Vitamins Feed Grade Meal,Water Soluble Vitamin,Vitamin Mineral Water,Poultry Feed Grade Vitamin
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