The dissolution method is applied to emulsion pesticides with precipitation. The medicinal agent can be immersed in warm water of 35 ° C ~ 40 ° C for one hour. If the sediment at the bottom of the bottle dissolves, it can be used. It can also be used to filter out the sediment at the bottom of the bottle and put a proper amount of water in the bowl. The precipitate dissolves, indicating that the drug has not failed; if a small portion of the precipitate does not dissolve, it proves that the drug is about to fail, but it can also be used.
Burning method Suitable for powder pesticides. You can take a proper amount of powder pesticide on the metal foil and then burn it on the fire. If white smoke appears, it proves that there is no failure; if it does not appear white smoke or insolubilize, it proves to be a fake medicine.
The water method is applicable to wettable powders and emulsion pesticides. 50 grams of powder pesticide can be taken, placed in a glass bottle, add a certain amount of water, a little agitation, after half an hour, if the particles are suspended evenly, there is no precipitation at the bottom of the bottle, indicating that the drug has no failure. The wettable powder tends to become a block during storage. The agglomerated powder is first crushed, and a small amount of water is added. If it dissolves quickly, it proves that the medicine has not failed, and is not a counterfeit medicine.
The shock method applies to emulsion pesticides. First look at whether the top and bottom are layered. If it is layered, it can be oscillated up and down to make it uniform and then allowed to stand for one hour. If it is still layered, it is not a failure and it is a fake medicine. It can not be reused.
Farmers Daily
Burning method Suitable for powder pesticides. You can take a proper amount of powder pesticide on the metal foil and then burn it on the fire. If white smoke appears, it proves that there is no failure; if it does not appear white smoke or insolubilize, it proves to be a fake medicine.
The water method is applicable to wettable powders and emulsion pesticides. 50 grams of powder pesticide can be taken, placed in a glass bottle, add a certain amount of water, a little agitation, after half an hour, if the particles are suspended evenly, there is no precipitation at the bottom of the bottle, indicating that the drug has no failure. The wettable powder tends to become a block during storage. The agglomerated powder is first crushed, and a small amount of water is added. If it dissolves quickly, it proves that the medicine has not failed, and is not a counterfeit medicine.
The shock method applies to emulsion pesticides. First look at whether the top and bottom are layered. If it is layered, it can be oscillated up and down to make it uniform and then allowed to stand for one hour. If it is still layered, it is not a failure and it is a fake medicine. It can not be reused.
Farmers Daily
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