In the course of crop management, due to improper or misuse of pesticides, indiscriminate use of inferior pesticides, and unsuccessful use of pesticides, the occurrence of crop injury often occurs. Lightly affect the growth of plants, but it will destroy the seedlings. Therefore, the following five methods must be adopted to respond to the nature of the pesticide and the severity of the injury:
Spraying water and washing medicine: If the leaves and plants spray liquid medicine caused by phytotoxicity, and found early, the liquid is not completely penetrated or absorbed into the plant body, can be quickly sprayed with a lot of water on the affected plants, repeated spraying 3-4 times, try to Wash the medicine on the surface of the plant. It is also possible to add 0.2% alkali or 0.5% lime water to the sprayed water. Because most of the pesticides are acidic at present, they are decomposed and degraded by alkaline substances, which can accelerate the decomposition of pharmaceuticals.
Fertilizer-promoting seedlings: If the leaves have produced drug spots, leaf edge scorch or plant coking and other symptoms of phytotoxicity, acres of topdressing urea 5-6 kg, but also appropriate to increase phosphorus and potassium fertilizer.
Irrigation and drainage to reduce drug residues: For some poisonous soil and some herbicides caused by the phytotoxicity, can be appropriate irrigation or drainage rinsing drugs to reduce toxicity, which can reduce the degree of injury.
Spray pharmacologically-relieved drugs: Targeted crops that cause crop damage can be sprayed with agents that can ease the drug, which can greatly reduce the damage caused by the injury. For example, if paclobutrazol is used in excess, 0.05% of the "900" solution can be sprayed, and the organophosphorus pesticide produced can be sprayed with 0.2% borax solution. Dedicated solutions can relieve the harm caused by various pesticides.
Removal of phytotoxic parts: When overdosing or over-concentration of fruit trees is caused by phytotoxicity, the lightly damaged branches should be quickly cut off to avoid further conduction and infiltration, and timely irrigation should be carried out to prevent phytotoxicity from continuing to expand.
For the serious phytotoxicity should be ploughed and turned into other crops. For the application of long-term drug residues, it should be repeatedly plowing irrigation, so that the residue infiltration, leaching below the tillage layer, to avoid further injury.
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