Vegetable greenhouse disinfection method
After one year of planting greenhouses and greenhouses, a large amount of pathogens, viruses, insects and weeds have accumulated in the soil, which will inevitably cause adverse effects on the squat vegetables. It is recommended that vegetable farmers sterilize greenhouse soil and sheds after cleaning. deal with.
1. Sterile room disinfection. Before sowing or planting, 7 to 10 days, 4 grams of sulfur per square meter of space, 8 grams of sawdust is mixed, and it is burned in a container, usually at night, and the smoke is closed for 24 hours. Can also be used per cubic meter of space with 25% Chlorothalonil l, 8 grams of sawdust mixing, lit smoke smoke disinfection.
2. Soil temperature sterilization. Cultivate the soil in the plough layer, cover the mulch, heat the shed in sunny weather, make the soil temperature above 60°C, and continue for 2 to 3 days. In order to improve the sterilization effect, it can also be applied to the soil before exposure.
3. Flood irrigation. The soil is ploughed, broken, and then irrigated into the shed to kill germs. At the same time, flood irrigation is beneficial to the decomposition of organisms, improve the physicochemical properties of bed soil, and coordinate soil water, fertilizer, gas, heat and other factors.
4. Disinfection of greenhouses, greenhouse skeletons and ancillary facilities. For nursery equipment, production tools, etc., such as shed skeletons and nutrient bowls, a 1% to 2% formalin solution can be sprayed or scrubbed and sealed.
5. Disinfection of soil chemicals. The main diseases that spread by soil are verticillium wilt, bacterial wilt and blight. The prevention and treatment of these diseases can be done by pouring 100 to 200 times of formalin along the gingival sulcus for the first half of the planting period, and then covering with polyethylene film and sealing for 5 days. After 7 days, the plants can be colonized after all the chemicals have evaporated. It is also possible to use 50% carbendazim, 50% thiophanate, etc. to soil the soil.
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