Pre-sowing sterilization method for Chinese medicinal seeds

1. Soaking with hot water The dried seeds of medicinal herbs are soaked in hot water of 50°C-55°C for 15 minutes. The stirring is continued so that the seeds are uniformly heated and the water is kept warm after the water temperature is lowered. Then remove it and put it into cold water, stirring continuously to cool the seeds evenly.

2. Boiling hot seeds will be packed into a gauze bag, into 85 °C ~ 100 °C water scalding, pay attention to stir evenly. Rinse with cool water immediately after removing it. Repeat this for 3 to 4 times. This method is mainly applied to seeds with thick seed coats of melons.

3. The weight ratio of white wine soaked seeds, white wine and water is 2:1:1. First mix the white wine with water, then put the seeds in the soak for 10 minutes, remove and germinate. This method can significantly increase the seed germination rate and germination potential.

4. Potassium permanganate soaking Seeds of medicinal herbs are first soaked in warm water at 50°C for 20-25 minutes and then removed. Put in 1% potassium permanganate solution for 15 minutes, then rinse with water to kill various pathogens such as blight, anthracnose and blight.

5. Formalin soaking Seeds of medicinal herbs are soaked in warm water at 30°C for 4 to 6 hours, then soaked in 1% formalin for 15 to 20 minutes. After removal, they are wrapped in wet cloth and placed in pots. For 3 hours, rinse with clean water. This method can prevent diseases such as epidemics, anthrax, blight, and brown smut.

6. Medicinal powder dressing powder can choose to use powder, carbendazim, thiram, or seed dressing spirit. The powder dosage is 0.3% to 0.5% of the seed weight. Soak the seed in warm water for 4 to 6 hours. Remove the powder and mix well.

7. The dosage of bleaching powder mud dressing is 2% of the seed weight, and the amount of mud is suitable to mix the seeds. Put the bleaching powder into the slurry and mix the seeds, put it in the container and seal it for 15-20 hours. This method can kill black rot fungus on the seeds of Radix isatidis, gentian.

8. Seed coating The seeds are coated with a seed coating agent containing a bactericidal agent to prevent the diseases of various herbs. Seed coating technology is currently the most effective pre-sowing seed disinfection method and post-sowing seedling preservation, disease prevention and insect control measures.

4. Prevent wet hazards to open good side ditch, gutter, deep trench high compartment, narrow compartment, deep trench 30-40 cm, compartment width 1.5-2 meters, in the whole growth period of rapeseed should pay attention to clear drainage, prevent dehumidification harm.

5. Increase the use of phosphate fertilizer 30-40 kg of superphosphate.

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