After one year of planting in vegetable greenhouses and greenhouses, a large amount of germs, viruses, insect sources and weeds have accumulated in the soil, which will inevitably cause adverse effects on the next crop of vegetables. It is recommended that vegetable farmers friends disinfect the greenhouse soil and greenhouse after cleaning deal with.
1. Disinfect the shed. 7 to 10 days before sowing or planting, mix 4 grams of sulfur and 8 grams of sawdust per cubic meter of space and burn in a container, usually in the evening, and fumigate the shed for 24 hours. It can also be mixed with 1 g of 25% chlorothalonil and 8 g of sawdust per cubic meter of space, and lighted and smoked for disinfection.
2. Soil high temperature sterilization. Cultivate loose layer soil, cover with plastic film, close the greenhouse on a sunny day to increase the temperature, and make the soil temperature reach above 60 ℃ for 2 to 3 days. In order to improve the sterilization effect, it can also be applied in the soil before exposure.
3. Flood irrigation. Till the soil and crush it, rake it flat, and then irrigate the shed to kill the germs. At the same time, after flood irrigation, it is beneficial to the decay of organisms, to improve the physical and chemical properties of bed soils, and to coordinate factors such as soil water, fertilizer, gas, and heat.
4. Disinfection of greenhouse, greenhouse skeleton and auxiliary facilities. For the nursery equipment and production tools such as greenhouse skeletons, nutrition bowls, etc., 1% to 2% formalin solution can be evenly sprayed or scrubbed and sealed for disinfection.
5. Disinfection of soil chemicals. Diseases spread by soil mainly include Verticillium wilt, Verticillium wilt and Fusarium wilt. These diseases can be controlled by pouring formalin 100-200 times along the furrow half a month before planting, and then covered with polyethylene film and sealed for 5 days. After 7 days, the plant can be colonized after all the chemicals have evaporated. 50% carbendazim, 50% thiophanate, etc. can also be used to sprinkle soil.
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