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Pay attention to the control of vegetable pests and diseases
Based on the analysis of the current situation of vegetable seedlings, the number of pests and their future climate, it is expected that the major pests such as Bemisia tabaci and L. sativae will appear moderately mild in the middle of April, downy mildew, gray mold, early blight, and sclerotinia Occurrence of major diseases such as major diseases occur, and localities should take timely measures to prevent and control them. Bemisia tabaci has a high rate of reproduction and is difficult to control. It should adhere to the principle of early prevention and early treatment. Solanaceous vegetable greenhouses should use yellow plates to trap adult insects, and 15-18 yellow plates are suspended per acre and hung above the plants at a height of 10 cm. When there are 3-5 adults in the field, there are 52.25% Chlorocyanin Chlorpyrifos EC 50ml plus 3% Acetamiprid EC 40ml per mu, plus 50 kg water spray. The leaf miner was controlled and sprayed with 50% ciprofloxacin WP 1000 times. The control of leafy vegetable aphids was sprayed with 10% imidacloprid WP 1000 times. Prevention and control of diseases must be “five persistenceâ€, that is, persist in planting tillage and change crop rotations to reduce the number of pathogenic bacteria; adhere to plastic film coverage and deep ditch sorghum cultivation, control the temperature and humidity in the shed, and adhere to transplanting with drugs to ensure transplanting. Disease-free seedlings; insist on early detection and early control, timely removal of field diseased plants, removal of diseased leaves and diseased fruit, and bring out the destruction of the field; adhere to the prevention of drug selection in the early stages of disease prevention. At present, we must focus on prevention and control of diseases such as botrytis, diseases, sclerotinia, and downy mildew. Before transplanting, the seedlings should be sprayed with 720 g/l of frambohydrine hydrochloride 800 times, and the more serious fields should be treated with drugs for 2-3 times, and the interval between drug use is 5-7 days. Controlled gray mold, sprayed with 50% procymidone wettable powder or Shijiale 40% pyrimethanil suspension 1000 times. Control epidemic and downy mildew, spray with 80% Mancozem WP wettable powder 600-800 times, or use 50% enoyl morpholine wettable powder or Kelu 72% urea manganese zinc wettable powder 500- 600 times liquid spray. Sclerotinia is controlled and sprayed with 50% procymidone wettable powder or 50% isoprenil wettable powder 1000 times.