Pesticides and pesticides stored in the pesticide business units, due to poor management, reduce the efficacy of pesticides, and some even fail. To this end, the experts introduced several ways to identify whether various types of pesticides have failed:
Milk pesticide identification method:
Observation method: It is found that the pesticide ink has precipitation and stratified flocculation. The bottle can be kept in the hot simmer for 1 hour. If the sediment is decomposed, the flocculent disappears, indicating that the pesticide is effective; otherwise, it can no longer be used.
Shaking method: stratification occurs in the pesticide bottle, the lower layer of the upper layer of oil slicks, and the medicine bottle can be shaken to make the pesticide uniform. After standing for 1 hour, if it is still layered, it proves that the pesticide has deteriorated. If the layering disappears, it means that it has not expired and can 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 and stir evenly, put it for 10 minutes - 20 minutes, the fine pesticide powder is fine, less and the precipitation is slow; The failed pesticide powder is precipitated quickly and often.
Cauterization method: take 10g-20g of powder pesticide, put it on the metal piece and put it on the fire. If it is white smoke, it proves that the pesticide has not failed, otherwise it means it has failed. It is usually used to identify 5% of carbendazim powder.
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.
Wettable powder pesticide identification method:
Take a cup of water and gently spread a little pesticide on the water. After 1 minute, if the pesticide is not dissolved in the water, it has deteriorated. In addition, 1 g of pesticide is sprinkled into a glass of water and stirred thoroughly; if precipitation occurs quickly, the liquid surface appears translucent, indicating that the pesticide has failed and cannot be used.
Milk pesticide identification method:
Observation method: It is found that the pesticide ink has precipitation and stratified flocculation. The bottle can be kept in the hot simmer for 1 hour. If the sediment is decomposed, the flocculent disappears, indicating that the pesticide is effective; otherwise, it can no longer be used.
Shaking method: stratification occurs in the pesticide bottle, the lower layer of the upper layer of oil slicks, and the medicine bottle can be shaken to make the pesticide uniform. After standing for 1 hour, if it is still layered, it proves that the pesticide has deteriorated. If the layering disappears, it means that it has not expired and can 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 and stir evenly, put it for 10 minutes - 20 minutes, the fine pesticide powder is fine, less and the precipitation is slow; The failed pesticide powder is precipitated quickly and often.
Cauterization method: take 10g-20g of powder pesticide, put it on the metal piece and put it on the fire. If it is white smoke, it proves that the pesticide has not failed, otherwise it means it has failed. It is usually used to identify 5% of carbendazim powder.
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.
Wettable powder pesticide identification method:
Take a cup of water and gently spread a little pesticide on the water. After 1 minute, if the pesticide is not dissolved in the water, it has deteriorated. In addition, 1 g of pesticide is sprinkled into a glass of water and stirred thoroughly; if precipitation occurs quickly, the liquid surface appears translucent, indicating that the pesticide has failed and cannot be used.
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