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Disinfection of pentachloronitrobenzene. 4 g of pentachloronitrobenzene and 5 g of dexamethasone per square meter of nursery, mix well with 12 kg of fine soil, cover the top with seeds, and spread the soil for anthracnose, blight, and tripping Disease, sclerotinia, etc. have special effects.
Formalin disinfection. Each square meter of nursery is sprayed evenly on the surface with 50 ml of formalin and 10 kg of water, and then covered with a straw bag or plastic film. The cover is removed for about 10 days to allow the gas to evaporate. After two days, it can be sown or cut. This method has a good effect on controlling blight, brown spot, angular leaf spot and anthracnose.
Bordeaux liquid disinfection. For each square meter of nursery, use an equal amount (copper sulfate: lime: water: 1:1:100) of 2.5 kg of Bordeaux mixture, and add 10 g of Sai Sai to spray the soil. After the soil is slightly dry, it can be sown or cut. It has obvious effects on black spot, spot disease, gray mold, brown spot and anthracnose.
Carbendazim disinfection. Carbendazim can control a variety of fungal diseases, and has a good effect on the control of diseases caused by ascomycetes and deuteromycetes. 50% wettable powder for soil disinfection, 1.5 grams per square meter, can prevent root rot, stem rot, leaf blight, gray spot, etc., can also be prepared in a ratio of 1:20. On the seedbed, it can effectively prevent seedling diseases.
Disinfection of ferrous sulfate. The soil is treated with 3% ferrous sulfate solution, 0.5 kg per square meter of liquid medicine; 350 times of water is used to dissolve the ammonium salt of 350 times, and 3 kg of dilution solution is poured per square meter of nursery soil. The sterilizing power of the sensible ammonium is strong. Infiltrated into the plant, there is a certain fertilizer effect after decomposition. It can control various diseases of black spot, downy mildew, powdery mildew, blight and bulbous bulbs.
From: Rural Volkswagen
Spring vegetable seed bed disinfection technology
In the Spring vegetable seedling process, seedbed disinfection is very important. Several disinfection methods are introduced:
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