In agricultural production, pesticides eliminate the strong guarantee of crop pests and diseases, and the effective use of pesticides can bring high returns to farmers. However, the misuse of pesticides is misused, and there is no control effect, but the crops may be damaged and the production may be reduced or even rejected. The following small series introduces readers to several methods for distinguishing pesticides. coffee table dining table,round coffee table,coffee table end table,Full-length mirror,Sofa table,sofa set,sofas on sale, sofa chair,Living Room Furniture,Furniture coffee table,bedroom mirror,standing mirror,copper mirror with frame,Standing Floor Mirror Furniture,Handmade Kitchen Sink,Handmade Sink For Kitchen,Sink Handmade Duraplex Limited , https://www.fsduraplex.com
1. Dry powders Such pesticides, if they are in a damp state, can form a wet mass when held by hand, 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.
2. 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.
Third, the emulsion class In the identification of such pesticides, the bottle can be shaken vigorously, left to stand for about 1 hour and then observed. 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.