Invalid pesticide identification

Dry powders Such pesticides, if they are in a damp state, can form a wet mass when held by hands, and are semi-failed pesticides; if they form a soft block, they all fail. Normal dry powder pesticides should be free of moisture and agglomeration.
Wet powders should be poured into a container with a small amount of pesticide. Add a proper amount of water to make it into a paste, then add a small amount of water and mix well. After standing, observe, if it is an undeteriorated pesticide, its suspension is better. The precipitation rate of the particles is slow and the precipitate is also extremely small. On the contrary, pesticides with different degrees of failure or deterioration should be used with caution.
Emulsions When identifying such pesticides, the flask can be shaken vigorously for about 1 hour. If stratification occurs, the pesticide has failed. In addition, the medicine bottle can be placed in warm water, and it is observed after the heat absorption. If it is an undeteriorated pesticide, the precipitate in the bottle will slowly dissolve or even disappear completely. On the contrary, it is a failed pesticide.

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