How to identify failed pesticides
Screw and Barrel for injection machine Screw And Barrel For Injection Machine,Screw Barrel,Screw And Barrel,Barrel Screw Zhoushan Dinghai Jinsheng Bimetallic Plastic Machinery Factory (General Partners) , https://www.jinshenggalloy.com
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.
Wettable powders Take a small amount of pesticide and pour it into a container. 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. In the case of an undeteriorated pesticide, the suspension property is good, the precipitation rate of the powder particles is slow, and the precipitate is particularly small. On the contrary, pesticides with different degrees of failure or deterioration should be used with caution.
Emulsions When distinguishing such pesticides, the flask can be shaken vigorously and allowed to stand for about 1 hour before observation. If stratification occurs, the pesticide has expired. 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; otherwise, it is a failed pesticide.
Huaxian Liu Huimin