In early spring, there are many vegetable seedbed diseases, such as damping-off, blight, gray mold, anthrax, and wilt disease. The prevention and control methods are described as follows: 1. Seed disinfection. Soaking seeds in the warm water of 55 degrees for 15 minutes can kill the germs attached to the surface of the seeds and act as germination. For damping-off disease, tomato early blight, and eggplant brown-leaf disease, formalin 100 times solution soaking for 10-15 minutes, then rinse with water, dry and sowing. The anthrax can be soaked in 100-fold solution of copper sulfate for 5 minutes. Second, bed soil disinfection. Mix 70% pentachloronitrobenzene powder with 65% zeocin WP or thiram wettable powder, apply 8-9 grams per square meter bed, and mix with 15 kg dry fine soil. And cover soil. It is also possible to use 5 grams of 70% dexamethasone per square metre and mix it with doubling fine soil and sprinkle it in the seedbed. If the bed soil is relatively dry, it can be used 200-400 times that of zesin ammonium, 2-4 kg per square meter of bed soil, both disinfection and play the role of moist bed soil. Third, carefully nurse seedlings. The bed temperature is required to maintain 30 degrees before emergence and 20-25 degrees after emergence. Sunny temperature control 25 degrees, cloudy 16 degrees, night 7-10 degrees lower than the day. The bottom water is soaking the topsoil 10-13 cm so that it is wet during the day and dry at night. It is sunny and wet and cloudy. After the seedlings are unearthed, the seedlings are often planted by means of low temperature and controlled watering. The seedlings are planted 7 days before transplanting, and open-air seedlings are also required at night without weather and frost. Fourth, timely medication. Every 10-15 days, spraying with 65% dexamethasone 600-800 times once, can also use 50% dexamethasone and 70% thiophanate 1000 times alternately. When individual strains appear on the seedbed, the diseased plants should be removed immediately and sprayed in time to prevent the spread of the disease.
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