First of all, after the garden is pulled out of the park, you should pay attention to cleaning the garden. Cleaning the garden is to improve the health of the sheds. The main reason is to clean up the leaves from the sheds and destroy them in order to avoid becoming a new source of infection. The weeds outside the shed must also be cleaned up and eradicated. The place where pests live and reproduce is an important measure to prevent the circulation of pathogens.
After the garden has been cleared, a complete disinfection should be performed in the greenhouse. The disinfection of greenhouses is generally smoked with sulfur. Before the smoke, the air outlet is closed. Each cubic meter of space uses 4 grams of sulfur and 8 grams of sawdust. At 7:00 pm, sawdust is piled every 2 meters. Sulfur powder layer, pour a small amount of alcohol, one by one ignite, 24 hours after the release of smoke. This method has good disinfection effect, low cost, and convenient materials. 45% chlorothalonil or 30% sucrose can also be used. The former is effective against most fungal diseases. Sucralose or chlorothalonil and serotonine blends can be used as ash. Mildew disease-dominated diseases have significant control effects. The dosage per acre is: 30% quick-cocking smoke agent 300 to 500 g, 45% chlorothalonil flue-smell agent 200 to 250 g, uniformly placed, ignited separately, and then the enclosed shed smokes for 2 to 3 hours. good.
The auxiliary facilities such as greenhouse skeletons, nutrients, shovels, and work clothes should also be disinfected. Can be used 1% to 2% formalin aqueous solution evenly sprayed or scrubbed in the greenhouse after the high-temperature stuffy shed disinfection, can receive good results.
After the shed is disinfected, the soil shall be sown in time and the soil shall be disinfected so as to prevent the occurrence of soil-borne diseases of the squat vegetable. Soil infections include verticillium wilt, bacterial wilt, and blight. To prevent and treat these diseases, the formalin may be poured 100 to 200 times in the first half of the planting period, and then covered with a polyethylene film and sealed for 5 days. After one week, all the pesticides can be volatilized before being planted. The soil can also be sprayed with 50% carbendazim, 50% thiophanate, 75% Dikeson 1000x, double effect spirit, and 300 times anti-drygar.
After the soil is treated, the greenhouse can be closed and high temperature can be used to make the shelter. This is also one of the most important disinfection measures in greenhouse disinfection. This method chooses sunny days, closes the greenhouse, uses sunlight and indoor high temperature for indoor disinfection, generally 5 to 10 cm deep soil temperature up to 40 ~ 60 °C, the highest soil temperature energy up to 50 ~ 70 °C, can seal exposure 15 ~ 20 days. For the control of root-knot nematode diseases, high-temperature stuffy sheds can be combined to fumigate with methyl bromide in the shed.
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