Due to improper application or misuse of pesticides, indiscriminate use of low-quality pesticides, and unwashed and unsuccessful use of pesticides, crop phytotoxicity occurs from time to time, and plant growth is affected at times, and crops are destroyed. Therefore, the following five methods must be adopted for the first aid according to the nature of the pesticide and the severity of the injury. Water spray If the leaves and plants spray liquid medicine caused by the damage, and found early, the liquid is not completely penetrated or absorbed into the plant body, can be quickly sprayed with a lot of water affected plants, repeated spraying 3-4 times, try to put the plant surface The drug flushes off. It is also possible to add 0.2% alkali or 0.5% lime water to the sprayed water. Since most pesticides are acidic at present, they are degraded and degraded by alkaline substances, which can accelerate the decomposition of the chemicals. Top dressing If the leaves have produced drug spots, leaf edge scorch or plant coking and other symptoms of injury, acres of topdressing urea 5-6 kilograms, but also appropriate addition of phosphorus and potassium fertilizers. Irrigation and drainage reduce drug residues For some poisonous soils and some herbicides caused by the phytotoxicity, can be appropriate irrigation or drainage rinsing drugs to reduce toxicity, which can reduce the extent of injury. Sphygmomanometers for pharmacotherapy For the drugs that cause crop damage, targeted spraying can relieve the drug's agents, which can greatly reduce the damage caused by pesticides. For example, paclobutrazol can be sprayed with 0.05% of the “ninety†solution; and it can cause harm to organophosphorus pesticides. Can be sprayed with 0.2% borax solution to ease. Dedicated solutions can relieve the harm caused by various pesticides. Remove tainted parts When overdosing, over-concentration and phytotoxicity occur in the fruit trees, the lightly damaged branches should be quickly cut off to avoid further conduction and infiltration, and timely irrigation should be carried out to prevent and control the injury. For the serious phytotoxicity should be ploughed and turned into other crops. For the application of long-lived drugs, it should be repeatedly plowing irrigation, so that the residue infiltration, leaching below the plough layer, to avoid another phytotoxicity.
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