When pesticides are purchased, they must have a certain method of identification. The most important thing is that they are genuine. How can we buy pesticides with good efficacy in the current complex pesticide market?
The following methods are simple ways to identify the efficacy of pesticides, for reference, I hope to help the majority of farmers.
1. Emulsion pesticide efficacy identification method
(1) Observing method: It was found that there was precipitation and layered flocculation in the pesticide bottle. This medicine bottle can be placed in hot water and allowed to stand for 1 hour if the sediment is decomposed and flocculated.
The disappearance of the knot indicates that the pesticide is effective. Otherwise, pesticide failure can no longer be made. (2) Oscillation method: stratification phenomenon occurs in the pesticide bottle, and the upper layer of the upper oil layer can be precipitated.
Shake the vial vigorously to mix the two layers and let stand for one hour. If it is still stratified, it proves that the pesticide has gone bad. If the stratification disappears, the pesticide has not failed.
can use.
2, wettable powder pesticide efficacy identification method
(1) Lightly sprinkle a small amount of pesticide on the ground with splashed water. If the pesticide does not dissolve after 1 minute, it means that it has failed. (2) Disperse 1 gram of pesticide into 1 cup of water
Stir thoroughly. If the sedimentation rate is fast and the liquid level is translucent, it means the pesticide has failed and should not be used.
3, powder system pesticide efficacy method
(1) Suspension method: Take 50 grams of pesticide powder and put it in a glass bottle. Add a little water to make it into a paste. Add appropriate amount of fresh water and mix well. Place 10~20 points
Zhong, good pesticide powder is fine, sedimentation is slow and less; failure pesticides are coarse, precipitation is rapid and many. (2) Observation method: If powdered pesticides have become agglomerated, it is not easy to distinguish
Solution, proved to be invalid, can no longer be used.
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