Observation method: If the powder pesticide has been agglomerated, it is not easy to be broken, and it proves to be invalid and can no longer be used.
Suspension method: take 50 grams of powder pesticide, put it in a glass bottle, add a little water to make a paste, then add an appropriate amount of water to stir evenly, put it for 10~20 minutes, the fine pesticide powder is fine, less and the precipitation is slow; Pesticide powders precipitate quickly and often.
Combustion method: Take 10~20 grams of powder pesticide, put it on a metal piece and put it on fire. If it is white smoke, it proves that the pesticide has not failed, otherwise it means it has failed. This method is usually used to identify 5% of carbendazim powder.
Suspension method: take 50 grams of powder pesticide, put it in a glass bottle, add a little water to make a paste, then add an appropriate amount of water to stir evenly, put it for 10~20 minutes, the fine pesticide powder is fine, less and the precipitation is slow; Pesticide powders precipitate quickly and often.
Combustion method: Take 10~20 grams of powder pesticide, put it on a metal piece and put it on fire. If it is white smoke, it proves that the pesticide has not failed, otherwise it means it has failed. This method is usually used to identify 5% of carbendazim powder.
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