1. Spraying drugs that relieve phytotoxicity
For drugs that cause crop phytotoxicity, targeted spraying of drugs that can alleviate the drug can reduce the loss of phytotoxicity. For example, omethoate, parathion and other pesticides cause phytotoxicity to crops, which can be mitigated by spraying 0.2% borax solution on the affected crops; rapeseed and peanut seedlings are over-rejected by paclobutrazol, growth is stagnant, and 0.05% can be sprayed in time. The "920" solution can quickly restore the normal growth of crops; the crop phytotoxicity caused by copper sulphate and Bordeaux mixture can be sprayed with 0.5% lime water to alleviate the phytotoxicity.
2, quickly pursue quick-acting nitrogen fertilizer
For the phytotoxicity of foliar lesions, leaf edge scorch or plant yellowing, depending on soil fertility and crop growth conditions, 5 to 12 kg of urea per 667 square meters (1 mu) may be applied, and phosphorus and potassium fertilizers may be appropriately added. Supplementing plant nutrition, combined with cultivating loose soil, promoting root development, enhancing plant resistance, and the effect of seedlings and seedlings with less phytotoxicity is extremely obvious.
3, drainage irrigation to reduce drug residues
For some phytotoxicity caused by herbicides, proper drainage of water can reduce drug residues. For example, the rice dwarf disease caused by herbicide can immediately drain the exposed field in the initial stage, and then use the gap irrigation to reduce the residue of pesticide residues, thereby reducing the degree of phytotoxicity.
4, remove the phytotoxicity
When the application of perfusion, injection, dressing, etc. on the fruit trees is excessive and excessive, and the phytotoxicity occurs, the branches with heavier damage should be quickly cut off to prevent the drug from continuing to conduct and penetrate, and timely irrigation should be carried out to prevent the phytotoxicity from continuing to expand. .
5, spray large water rinse agent
Because spraying a certain pesticide to cause damage to plants and leaves, it is possible to spray large water 2 to 3 times repeatedly, and wash the medicine on the surface of the plant as much as possible. It is also possible to add 0.2% alkali surface or 0.5% lime water to the sprayed clean water. Since most of the pesticides are easily decomposed and reduced by the alkaline substances, the decomposition of the medicament can be accelerated. At the same time, spraying water increases the moisture in the crop cells, diluting the concentration of the liquid in the crop, and reducing the phytotoxicity of the crop.
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