How to identify pesticide efficacy

L, emulsion pesticide efficacy identification method (1) observation method: found in the pesticide bottle precipitation, layered flocculation phenomenon, this bottle can be placed in hot water, let stand for 1 hour, if the sediment decomposition, flocculation Disappeared, indicating that the pesticide is effective. Otherwise, pesticide failure can no longer be made. (2) Swinging method: The stratification phenomenon occurs in the pesticide bottle. The lower layer of the upper slick is precipitated. The vial can be shaken by force to mix the two layers and stand for one hour. If the layer is still stratified, it proves that the pesticide has gone bad. If the stratification disappears, indicating that the pesticide has not failed, it can be used. 2. Powdered pesticide efficacy identification method (1) Suspension method: Take 50 grams of pesticide powder and put it in a glass bottle. Add a little water to make a paste, and add appropriate amount of fresh water and mix well. Place 10-20 minutes, good pesticide particles are fine, precipitation is slow and less; failure of pesticide particles coarse, precipitation faster and more. (2) Observation method: If the powdered pesticide is agglomerated, it is not easily decomposed and proves to be invalid and can no longer be used. 3, WP efficacy of pesticide identification method (1) will be a small amount of pesticides sprinkled on the splash of water on the ground, if the pesticide is not dissolved after 1 minute, indicating that the failure. (2) Dispense 1 gram of pesticide in 1 cup of water, stir it well, if the sedimentation speed is fast, the liquid level. If it is translucent, it indicates that the pesticide has failed and should not be used. China Agricultural Network Editor

Posted on June 29, 2018