1. Choose resistant varieties. The varieties cultivated in the winter greenhouse should adopt excellent varieties of infinite growth type, large fruit, cold tolerance, yin resistance and disease resistance.
2. Apply organic fertilizer. The soil that is prone to rooting is mostly clay loam with heavy weight and poor gas permeability. Organic fertilizer is not only rich in nutrients, but also can effectively improve soil aggregate structure, increase soil permeability and prevent disease.
3. Before the high temperature shack. In particular, there are many pathogenic bacteria in the soil, and the high temperature suffocating shed can sterilize and prevent diseases. The method is: after 7~10 days before planting, the soil in the shed is turned 20cm deep, sprayed with carbendazim fungicide, and the film is covered. The temperature in the shed reaches 50-60 °C, and the shed is 5-7 days. The heavy stagnation can be repeated 2~3 times.
4. Number and timing of watering. Due to the low temperature and the evaporation of soil moisture in the winter warm shed, the watering should be properly controlled. It should not be flooded with large water, or it can be poured in one row. The time of watering should be mastered in the "cold tail, warm flow head", cold water or even cloudy days can not be watered.
5. High night temperature. The main factors affecting the production of winter shed vegetable production are night temperature. The method of raising night temperature is mainly to thicken the grass hoe, and the thickness is not visible in the shed after the day. Double-layer film covering, that is, a layer of film on the grasshopper at night, can not only keep warm, but also protect the grass from rain and snow.
6. Ventilation and light transmission in the strong shed. In the winter warm shed, especially after watering (under the premise of ensuring the temperature of the shed), the amount of ventilation and light transmission should be increased to reduce the air and soil humidity in the shed to prevent disease.
7. Change the soil. Any vegetable planted in the same plot for a long time will cause a large number of pathogens to multiply, and it is an effective measure to prevent the occurrence of serious diseases.
8. Blight control: At the beginning of the disease, 72% of agricultural streptomycin is used, 4000 times, or 77% can kill 500 times of WP, or 25% of lycopene copper is 500 times, and each solution 300~ 500mL, once every 8 ~ 10d, once every 2 to 3 times.
9. Control of wilting: at the beginning of the disease, 70% thiophanate-methyl WP can be used 800 times, or 50% carbendazim WP 600 times, or 70% carbendazim WP 2000 times, each plant The drug solution was 100 mL, and the root was irrigated once every 7 to 10 days, and it was continuously performed 3 to 4 times.
10. Control of rot: use 72,2% Plex water 600 times, or 64% antivirus WP WP 500 times, or 97% methicillin WP 2500-3000 times, or 70% fungus The WP can be rooted at 2000 times, 100 mL per drug solution, and rooted once every 7 to 10 days, continuously for 2 to 3 times.
11. Prevention and control of base rot: In the early stage of the disease, spray the stem base and soil with 97% carbendazim WP 1200 times or 1200 times of 20% methyl chlorophosphorus emulsifiable concentrate, or apply 200 times pentachloronitrate in the diseased part. Base benzene powder plus 200 times 50% Fumei double wettable powder. It is also possible to apply 97% of carbendazim WP and naphthalene acetate in the base of the stem, and cover the base of the diseased plant to bury the diseased part, so that it can grow adventitious roots above the lesion, which can delay the life and strive for yield. .
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