Causes and Prevention of Crop Damage Caused by Crops

There are many reasons why phytotoxicity causes crop injury. One is the use of pesticides that are sensitive to crops. For example, sorghum, corn, and soybeans are more sensitive to trichlorfon and dichlorvos; pear trees are sensitive to dioscoreanil and chlorpheniramine and should be avoided. The second is improper application. If the concentration is too high or the amount of medication is too large, it may cause injury. Improper application techniques or unscientific preparation methods may also cause injury. Third, the use of pesticides in the crops at the seedling stage, flowering stage, young fruit stage, and weak crop growth and weak drug resistance can easily cause injury. Fourth, due to environmental influences, such as high temperature, strong light, air drying, relative humidity less than 50%, rain or dew when the application is easy to cause injury. Fifthly, the use of long-lived pesticides in crops caused secondary phytotoxicity to crops. In particular, some selective herbicides (including the sulfosulfuron) contained in crops were safe for crops on the upper crop and phytotoxicity to crops on lower crops. . Sixth, due to factors such as quality problems or improper use of pesticides, crops cause phytotoxicity.
Preventive measures to fully understand the nature of the drug, strictly control the use of dose and concentration, select the correct method of preparation and use. Pesticides that are sensitive to crops should be banned or used with caution. Seedling, flowering, young fruit, and weak crop conditions should be used with caution or reduced concentrations when weak resistance to chemicals. High temperature, drought, and strong winds should not be applied. Planting structures should be reasonably arranged. , To avoid the use of pesticides in the crops of the upper and lower crops, the neighboring crops cause secondary hazards, and drift hazards. For new pesticides that have not been applied locally, a small-scale phytotoxicity trial must be conducted before application.
Treatment measures Irrigation detoxification: It is the best way to solve the phytotoxicity caused by overdosing the soil, and it can be washed with water. Spraying water and washing medicine: Due to the use of excessive concentration or the use of sensitive pesticides caused by the upper part of the crop suffer from phytotoxicity, in the case of adequate water, it can be sprayed with water several times in a row to relieve phytotoxicity. Enough watering: Allows the crop roots to absorb enough water, increase cell moisture, and reduce the concentration of the liquid in the crop. Use antidote: According to the nature of the injury, choose the appropriate drug for remediation. Due to phytotoxicity caused by paclobutrazol, diaminotoluene or other inhibitors or delaying agents, the gibberellin solution can be sprayed to relieve. Topdressing available fertilizer: combined with the cultivating loose soil, strengthen the management of fertilizer and water, increase the availability of human and animal manure, ammonium bicarbonate, ammonium nitrate, urea and other available fertilizers to promote root development and new leaf regeneration.
Foliar spray fertilizer: foliar spray fertilizer crops absorb quickly, according to crop needs with 0.1% ~ 0.3% of potassium dihydrogen phosphate solution or 0.2% ~ 0.3% urea solution, or foliar treasure, spray Shibao, green wind 95 In order to promote the development of crop roots and restore growth as soon as possible, the foliar fertilizers such as the Shiji Nongfeng, multi-effect vitality factors, Huimanfeng, and Fengchanling were sprayed.

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