How should herbicide damage be remedied?

How should herbicide damage be remedied? 1. Triazobenzene herbicides 1. Application technology ⑴ control object: triazine herbicides mainly control annual weeds and perennial weeds propagated by seeds. Among annual weeds, the control of methoxy group of dicotyledonous weeds is better than that of Gramineae weeds. Among three nitrogen herbicides, only methoxy-triazobenzene herbicides can control some perennial weeds. Triazobenzene herbicides mainly kill weed buds, so they should be applied after crop planting and before weed sprouting. Although some varieties of herbicides can also be applied after seedlings, they should be used at the young stage of weeds. ⑵ dosage and application period: the amount of application should depend on soil texture and application time. Atrazine and simazine in triazobenzene herbicides have a long residual period and are easy to cause drug damage to the next crop, so they must be carried out according to the instructions or under the guidance of the technical department in production. Among the soil characteristics, the content of soil organic matter and clay had the greatest influence on the activity of triazobenzene herbicides. Simazine can reduce the toxicity of plants in soils with high contents of clay and organic matter. Soil pH is also an important factor affecting the weeding effect of triazobenzene herbicides. However, the soil PH value had little effect on atrazine, and atrazine was safe to corn under any conditions. 2. Remedial measures for drug damage the selectivity of triazobenzene herbicides is strong, and it is safe for a few crops such as corn, but it is easy to cause drug damage to other crops. The drug damage of this kind of herbicides is mainly prevented by the safe application technology of herbicides, and different remedial measures should be taken according to the degree of drug damage. When the drug damage is mild, crops can be restored in a short time by strengthening fertilizer and water management and spraying sodium bisulfite, brassinolide, compound sodium nitrate, etc.; for the land with heavy drug damage, deep turning and irrigation should be made in time, and then replant crops that are not sensitive to this kind of herbicides. 2. Amide herbicides 1. Application technology ⑴ control object: most varieties of amide herbicides mainly control annual Gramineae weeds and some broad-leaved weeds, but the control effect on perennial weeds is very poor. Chloroacetamide herbicides, such as Acetochlor, alachlor, Metolachlor, butachlor, etc., are soil treatment agents and are effective agents to control Gramineae weeds. N-phenyl-DI- alanines, such as Xinyanling, methfluramine and isopropylmethylfluramine, are stem and leaf treatment agents. It is a special medicine to control oatgrass in wheat field. Paspalum is a stem and leaf treatment agent, and it can also be used to control barnyardgrass in rice field. Naphthoxamine can be used to control broad-leaved weeds and sedges in rice fields, but not to barnyardgrass. ⑵ dosage and application period: chloroacetamide herbicides, Acetochlor has the highest herbicidal activity. It is suitable for soil with high content of organic matter, usually under the condition of high temperature and high humidity, the weeding effect is the best, and the dosage can be reduced appropriately; at low temperature, the effect is poor, and the dosage should be increased. Paspalum, butachlor and naphthoxamine are mainly used to remove seedlings in rice fields. Paspalum is very safe for rice, whether it is rice seedling field, direct seeding field, or transplanting field, it must be thoroughly drained before spraying. Under the condition of ensuring uniform spraying, the effect of weeding will be better if the amount of water is properly increased. After spraying for 2 days, the water layer could be deepened and the heart leaves of paspalum grass were submerged as the standard. New Yanling, methfluramine and isopropylmethylamine have special effect on the control of wild oat, but have no harm to wheat. The herbicidal effect is good when applied at high temperature and vigorous growth of oatgrass. 2. Remedial measures for drug damage amide herbicides are relatively safe to crops, but corresponding remedial measures should be taken according to different conditions for drug damage caused by excessive dosage or poor environmental conditions in the production process. Before sprouting after sowing, crops are prone to drug damage if rain or flood irrigation occurs after pesticide application. In general, the symptoms of drug damage can disappear after 15 days, and there is no need to take remedial measures. If we continue to irrigate and apply nitrogen fertilizer during this period, it will often aggravate the drug damage. For some crops in stagnant water, the drug damage may be serious, so it should be replanted in time, and the sowing depth should be increased appropriately. Click to get mass herbicide use technology click to get mass pesticide application technology