Seed coating agents can be divided into two categories according to the ingredients contained in them: one is a single dosage form, that is, a single agent containing a role, such as a disease-resistant bactericidal seed coating agent, insect-resistant insecticide seed agent, and The class is a compound dosage form, that is, a drug that has more than two functions; that is, a pesticide and fungicide are mixed together at a certain ratio to play a role in preventing diseases and insects and promoting the growth of crops.
Seed coating agent is different from previous soaking and seed dressing agents. Seed soaking and medicinal dressing, the medicament on the surface of the seed will dissolve in water after sowing into the soil, and the medicinal effect will soon decrease or disappear. The seed coating agent can form a solidified film immediately on the seed. After the seed enters the soil, it will swell with water and the seed coating will not be dissolved. With the germination, germination, emergence and growth of the seed, the effective ingredients on the seed coating will be gradually released , And is absorbed by the root system to conduct various parts of the plant, extending the effective period of the drug.
Precautions for seed coating. The seed coating agent contains highly effective broad-spectrum insecticidal and sterilizing highly toxic pesticides, and the following points should be noted when using coated corn seeds:
1. Prohibition of seed soaking and germination. When corn seed coating is dissolved in water, it will not only fail, but also inhibit the germination of seeds.
2. Prohibit routine germination test. The germination test procedure of corn-coated seeds is complicated, and the technical requirements are high. If the conventional germination test method is used, not only will germination not occur, but also the seed will lose its use value.
3. It is forbidden to use in low-lying water-logged and saline land. Coated corn seeds are prone to rancidity and rot under high-humidity soil conditions; in saline-alkali land, the seed coating agent will decompose and fail when met with alkali. Generally, it is not suitable to use coated corn seeds in the field with PH value greater than 8.
4. It is forbidden to use pockets filled with coated corn seeds for grain and feed. Containers filled with coated corn seeds must be cleaned before being used for other purposes. It is strictly forbidden to hold food again, and it should be burned in time if necessary.
5. Smoking, eating, drinking water while sowing are prohibited. Wear gloves and protective clothing when sowing. Do not eat or drink water during sowing. Do not rub eyes and face with hands before washing hands to prevent poisoning.
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