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Five methods to identify falsified pesticides
Check the law. Liquid pesticides should generally be transparent and free from slicks and precipitates. Take a drop of water and quickly emulsify and turn into a milky liquid; powdered pesticides should be loose and not agglomerate; wettable powders should be shaken in water to become emulsions. . In addition, we must also check whether the product packaging is qualified, whether there is a product registration number, a production permit number, an anti-counterfeiting mark, and whether the product is within the warranty period. Water law. Suitable for checking emulsion pesticides. Take a little chemical agent when checking, add 1~2 times of water, and let stand for 1 hour after mixing. If there is oil layer on the surface of the water, the pesticide is a fake and inferior pesticide. Concussion method. For emulsion pesticides. If the pesticide in the bottle appears to be stratified, shake it evenly and observe it after it has been placed for 1 hour. If there is still stratification, the pesticide has deteriorated. Suspension method. Used to inspect wettable pesticides. Take a small amount of powder in the cup during the inspection, add appropriate amount of water and stir into a paste, then add fresh water and mix it for a period of time. If precipitation occurs, it will be counterfeit pesticide. Test method. Used to check for new pesticides. According to the instructions for use, the liquid can be dispensed and then sprayed on the crops that already have pests and diseases. If the control effect does not meet the requirements for prevention and treatment, it means that the drug is invalid and may be fake and shoddy pesticides.
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