The onion seeds were soaked in 300-fold dilution of 40% formalin for 3 hours, then rinsed with water, dried and sowed; the bulbs were soaked in warm water of 40°C-45°C. Minutes, then cool in cold water, dry and plant. This can effectively prevent anthrax and melasma. Soak the onion seeds in warm water at 50°C for 25 minutes, then cool them in cold water, dry them and sow them; soak them in bulbs in warm water (15°C) for 90 minutes, then cool them in cold water and dry them. . This kills the downy mildew that comes on the onion seeds. Prior to sowing, uniform dressing with 50% thiophanate powder, which is 1% of the weight of garlic, or 50% carbendazim WP, which accounts for 1% of the weight of garlic, kills white rot, dry rot, and leaves of garlic. Diseases and other diseases. Soak 300g of 40% formalin for 3 hours, wash with water, dry, and sow; soak the onion bulbs in warm water of 45°C for 90 minutes and remove them. Cool in cold water, dry and plant. In doing so, it can kill purple spot pathogens carried by scallion seeds.
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