Five measures for prevention and control of vegetable diseases in greenhouses 1 Application of dust control methods This method saves labor, labor, and medicine, and distributes powder evenly. The commonly used agent is 5% chlorothalonil compound powder, 1,000 grams per acre, sprayed in the morning or evening, sprayed once every 7~9 days, and applied 2~3 times continuously, effectively preventing cucumber cream Mildew, anthrax, scab, powdery mildew and tomato gray mold, early and late blight. 2 Aerosol Fumigation Control This method applies uniform, high-efficiency, low residue and strict requirements for the sealing of the greenhouse. The commonly used fog agent is 45% chlorothalonil aerosol agent, 200-250 grams per acre, 7-10 days fumigation once, 4 to 5 times throughout the growth period, to control cucumber downy mildew, powdery mildew, blight Bacteria and tomato early and late blight, gray mold, leaf mold have special effects. 3 Spray control 3.1 For fungal downy mildew, epidemic disease, anthrax, powdery mildew, etc., 75% chlorothalonil or 64% antiviral MA and 25% metalaxyl WP may be used at the early stage of disease. 7 to 10 days spray 1, even spray 3 to 4 times. 3.2 For bacteria caused by bacterial leaf spot disease, epidemic disease, etc., 70% chlorothalonil wettable powder 500 times liquid, or 0.3% agricultural streptomycin 200106, 30% DT fungicide 300 times spray is used in the early stage of disease. More than 90% control effect. 3.3 Tomato virus disease, squash virus disease, etc. caused by bacteria, based on the elimination of aphids, migratory locusts and other transmission insects, in the premorbid and early onset with 20% of the virus A wettable powder 500 times spray control. 4 Irrigation of the liquid to the soil, rain, seed blight, verticillium wilt, etc., 50% carbendazim wettable powder 400 times, or 70% thiophanate-methyl wettable powder 800 times . 200-250 ml per strain of irrigated liquid was irrigated once every 10 days for 3 to 4 consecutive times. 5 Soil treatment Regardless of the land on which the recommended conditions are applied, the soil is treated with chemicals before sowing or planting of vegetables, which can effectively control Sclerotinia, Blight, and Verticillium wilt. Per square meter with 40% pentachloronitrobenzene or 25% carbendazim wettable powder 10 grams, mixed fine soil 1000 grams, sprinkled into the soil surface or into the soil.
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