I. Advantages and disadvantages of seed dressing methods
1. Advantages: Suitable for processing large batches of seeds with short time and high efficiency; having disinfecting effect on the seed itself, long effect; seed treatment time is more flexible, can be after the seeds are harvested, but also during the seed storage Or before sowing.
2. Disadvantages: It is not possible to sterilize the inside of the seeds. The treated seeds are also not suitable for water soaking and germination before sowing.
Second, commonly used agents, methods of use and control objects
1. Wet dressing with 50% Ketandan WP, 0.2% of the seed weight, control verticillium wilt, blight, and brown zebra disease. The dosage is 0.4% of the seed weight to control tomato wilt disease and leaf mold.
2, with seed dressing double wettable powder, the dosage is 0.2% of the seed weight, control Solanaceae vegetable seedling blight, cabbage damping-off disease, gourd blight. The dosage was 0.3% of the seed weight, and it was used to control vegetable root rot, melon wilt disease, cabbage root disease, carrot black spots and black rot.
3, dressing with 35% metalaxyl seed treatment, dosage is 0.2% of the seed weight, control vegetable soybean, beans, green onions, onions, cruciferous vegetables and other downy mildew.
4. Use 50% thiram for wettable powder dressing and 0.2% of the seed weight to control radish black rot, onion and onion smut. The dosage is 0.25% of the seed weight and controls the emergence of damping-off disease such as eggplant, melons, cabbage, broccoli, lettuce, and broad beans. The dosage is 0.3-0.4% of the seed weight to prevent anthracnose, vitiligo, downy mildew and bean anthracnose.
5, with 75% chlorothalonil WP dressing, dosage of 0.2% of the seed weight, prevention of pea root rot, cabbage damping-off disease, carrot black spot and so on.
6, with 70% mancozeb WP wet dressing, dosage of 0.2-0.3% of seed weight, control cabbage damping-off. The dosage was 0.3% of the seed weight to control carrot black spot, black rot, and spot disease. The dose is 0.4% of the seed weight to prevent black spot of cruciferous vegetables.
7, with 65% zein zinc WP wet dressing, the dosage is 0.3% of the seed weight, prevention cabbage black root disease, cabbage downy mildew and so on.
8, with 50% acetaminophen wettable powder seed dressing, the dosage is 0.2-0.3% of the seed weight, control cabbage black spot, white spot, melon leaf blight, pepper sclerotinia and so on.
9. Use 58% metalaxyl manganese zinc wettable powder for seed dressing. The dosage is 0.3% of the potato seed potato weight to prevent late blight.
Third, pay attention to matters
1. When dressing, make the medicine or powder evenly adhere to the surface of the seed.
2, the ratio of the amount of medication and the amount of seeds to be appropriate. When the powder is used for seed dressing, the weight of the powder is generally 0.2-0.3% of the dry seed weight. When the seed dressing is used, the dosage is generally about 2% of the dry seed weight.
1. Advantages: Suitable for processing large batches of seeds with short time and high efficiency; having disinfecting effect on the seed itself, long effect; seed treatment time is more flexible, can be after the seeds are harvested, but also during the seed storage Or before sowing.
2. Disadvantages: It is not possible to sterilize the inside of the seeds. The treated seeds are also not suitable for water soaking and germination before sowing.
Second, commonly used agents, methods of use and control objects
1. Wet dressing with 50% Ketandan WP, 0.2% of the seed weight, control verticillium wilt, blight, and brown zebra disease. The dosage is 0.4% of the seed weight to control tomato wilt disease and leaf mold.
2, with seed dressing double wettable powder, the dosage is 0.2% of the seed weight, control Solanaceae vegetable seedling blight, cabbage damping-off disease, gourd blight. The dosage was 0.3% of the seed weight, and it was used to control vegetable root rot, melon wilt disease, cabbage root disease, carrot black spots and black rot.
3, dressing with 35% metalaxyl seed treatment, dosage is 0.2% of the seed weight, control vegetable soybean, beans, green onions, onions, cruciferous vegetables and other downy mildew.
4. Use 50% thiram for wettable powder dressing and 0.2% of the seed weight to control radish black rot, onion and onion smut. The dosage is 0.25% of the seed weight and controls the emergence of damping-off disease such as eggplant, melons, cabbage, broccoli, lettuce, and broad beans. The dosage is 0.3-0.4% of the seed weight to prevent anthracnose, vitiligo, downy mildew and bean anthracnose.
5, with 75% chlorothalonil WP dressing, dosage of 0.2% of the seed weight, prevention of pea root rot, cabbage damping-off disease, carrot black spot and so on.
6, with 70% mancozeb WP wet dressing, dosage of 0.2-0.3% of seed weight, control cabbage damping-off. The dosage was 0.3% of the seed weight to control carrot black spot, black rot, and spot disease. The dose is 0.4% of the seed weight to prevent black spot of cruciferous vegetables.
7, with 65% zein zinc WP wet dressing, the dosage is 0.3% of the seed weight, prevention cabbage black root disease, cabbage downy mildew and so on.
8, with 50% acetaminophen wettable powder seed dressing, the dosage is 0.2-0.3% of the seed weight, control cabbage black spot, white spot, melon leaf blight, pepper sclerotinia and so on.
9. Use 58% metalaxyl manganese zinc wettable powder for seed dressing. The dosage is 0.3% of the potato seed potato weight to prevent late blight.
Third, pay attention to matters
1. When dressing, make the medicine or powder evenly adhere to the surface of the seed.
2, the ratio of the amount of medication and the amount of seeds to be appropriate. When the powder is used for seed dressing, the weight of the powder is generally 0.2-0.3% of the dry seed weight. When the seed dressing is used, the dosage is generally about 2% of the dry seed weight.
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