1. The onion seeds were immersed in 300-fold 40% formalin diluted for 3 hours. After immersion, they were rinsed with water, dried, and sowed. With the bulb breeding, the green onion bulbs were soaked in warm water of 45°C for 90 minutes, removed and cooled in cold water, dried and then planted, and the purple spot pathogens carried by the onion seeds could be killed. 2. The onion seeds can be evenly seeded with 50% ketandan wettable powder, 50% hexachlorobenzene powder or 50% thiram wettable powder according to the ratio of 1:4, which can prevent smut caused by onion seeds. Bacteria. 3. With bulbs, the onion bulbs were soaked in warm water at 43.5°C for 2 hours. Immediately after immersion, they were cooled with cold water, allowed to air-dry, and then planted to prevent stem nematode pathogens. 4. The onion seeds were soaked in 300-fold dilution of 40% formalin for 3 hours, washed with water after immersion, and allowed to dry after sowing. Onion bulbs propagated in bulbs can be soaked in warm water at 45°C for 1.5 hours. The bulbs can then be chilled in cold water, dried and planted. This can effectively kill the anthracnose and black spot pathogens on onion seeds. 5. The onion seeds were soaked in 50% warm water for 25 minutes. After soaking, the seeds were placed in cold water, cooled and allowed to dry before sowing. Onions propagated on bulbs can be soaked in warm water at 45°C for 90 minutes. After soaking, the bulbs are allowed to cool in cold water, then allowed to air-dry, and then planted. This can eliminate the downy mildew bacteria on onions. 6. Prior to sowing, the white dressing, dry rot, and dried leaves of garlic can be killed by uniformly dressing seeds with 1% 50% thiophanate-methyl powder or 1% 50% carbendazim WP. Diseases and other germs.
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