When corn produces herbicide phytotoxicity, fertilizer damage and plant growth regulator phytotoxicity, cutting corn leaves can not solve the phytotoxicity. The correct way is to take correct remedial measures to accelerate the metabolism of corn and harm the body. Excreted from the body. After cutting off the corn leaves, the photosynthesis of the corn is seriously reduced, which will greatly slow down the detoxification ability of the corn itself. This will not only help the corn to resume growth quickly, but will seriously affect the yield and quality of the corn.
Corn herbicide remedy
In the field, the field inspection should be strengthened within one week. Once the phytotoxicity is discovered, the corresponding technical measures should be immediately used to remedy the medicinal damage according to the different types and dosages of the drugs and the degree of hazard that may be caused by the prediction.
1. For the soil-treated herbicides, the phytotoxicity caused by excessive dosage can be used for cultivating, continuous irrigation, drainage, repeated rinsing to alleviate the phytotoxicity; and a certain amount of lime powder can be applied during watering. The acidic herbicide is neutralized, whereby the residual agent is washed and discharged, and the residual herbicide content in the soil is reduced. At the same time, strengthen field management and enhance corn resistance.
2. Strengthen field management and promote early growth of seedlings. The phytotoxicity caused by contact-killing herbicides can generally recover on their own when the damage is light; it can strengthen field management, cultivating loose soil, chasing quick-acting fertilizer and watering. At the same time, it is necessary to spray 1%~2% urea or 0.2%~0.3% potassium dihydrogen phosphate solution on the leaf surface, which is beneficial to the normal growth of corn. At the same time, it should also actively prevent other corn pests and diseases to improve the ability of corn to resist phytotoxicity. If the victim is too heavy, it should consider replanting, replanting or destroying the plant, so as to avoid serious production or production.
3. Apply plant growth regulators to promote growth. May be applied to corn seedlings when the corn is damaged by hormonal herbicide 2,4-D butyl ester, herbicide, etc., or the phytotoxicity of the systemic herbicide and the herbicide residue of the former crop. Brassinolide or foliar fertilizer ; can also be sprayed with ash, 1% lime water, etc. to stimulate growth; immediately after spraying, watering to dilute the concentration of residual liquid in the soil, relieve the degree of phytotoxicity, and remedy . In addition, if it is predicted that the soil residual agent of the former crop will endanger the corn, the activated carbon may also be used to coat the seed to prevent phytotoxicity.
4. Application of herbicide antidote. Herbicide antidote can reduce or eliminate the toxicity of herbicides to crops. For example, selective seed dressing protectants can be absorbed by seeds and inhibit herbicide damage to crops in roots and leaves. These drugs can protect corn from herbicides such as acetochlor and butachlor.
5, timely replanting and destroying seeds: If the corn field is too harmful, if the above measures still can not alleviate the degree of damage, then only the destruction or replanting of other crops can be taken to avoid causing greater losses.
(Source: Peasant's House, Beijing Baofeng Seed Industry, by large planters)
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