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When purchasing pesticides, you must master certain methods of identification. The truth is the most important. 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 farmers.
1. Emulsion pesticide efficacy identification method
(1) Observation method:
It was found that there were sedimentation and stratified flocculation in the pesticide bottle. The bottle could be placed in hot water and allowed to stand for 1 hour. If the sediment decomposed and the flocculation disappeared, the pesticide was effective. Otherwise, pesticide failure can no longer be achieved.
(2) Shaking method:
The stratification phenomenon appears in the pesticide bottle, and the lower layer of the upper slick is precipitated. The medicinal bottle can be shaken with force to make the two layers mix and stand for 1 hour. If it is still stratified, it proves that the pesticide has deteriorated. If the delamination disappears, the pesticide has not expired and can be used.
2, wettable powder pesticide efficacy identification method
(1) Lightly sprinkle a small amount of pesticide on the ground with water. If the pesticide does not dissolve after 1 minute, it means that it has failed.
(2) Sprinkle 1 gram of pesticide into 1 cup of water and mix well. If the sedimentation speed is fast, the liquid level. It is translucent, indicating that the pesticide has failed and should not be used.
3, powder pesticides efficacy identification method
(1) Suspension method:
Take 50 grams of powder pesticide, put it in a glass bottle, add a little water to make a paste, and add an appropriate amount of water to stir evenly. After 10-20 minutes, the good pesticide powder is fine, the precipitation is slow and less; the pesticide powder is coarse and the precipitation is much faster.
(2) Observation method:
If the powder pesticide has agglomerated, it is not easy to decompose, and it proves to be invalid and can no longer be used.
1. Emulsion pesticide efficacy identification method
(1) Observation method:
It was found that there were sedimentation and stratified flocculation in the pesticide bottle. The bottle could be placed in hot water and allowed to stand for 1 hour. If the sediment decomposed and the flocculation disappeared, the pesticide was effective. Otherwise, pesticide failure can no longer be achieved.
(2) Shaking method:
The stratification phenomenon appears in the pesticide bottle, and the lower layer of the upper slick is precipitated. The medicinal bottle can be shaken with force to make the two layers mix and stand for 1 hour. If it is still stratified, it proves that the pesticide has deteriorated. If the delamination disappears, the pesticide has not expired and can be used.
2, wettable powder pesticide efficacy identification method
(1) Lightly sprinkle a small amount of pesticide on the ground with water. If the pesticide does not dissolve after 1 minute, it means that it has failed.
(2) Sprinkle 1 gram of pesticide into 1 cup of water and mix well. If the sedimentation speed is fast, the liquid level. It is translucent, indicating that the pesticide has failed and should not be used.
3, powder pesticides efficacy identification method
(1) Suspension method:
Take 50 grams of powder pesticide, put it in a glass bottle, add a little water to make a paste, and add an appropriate amount of water to stir evenly. After 10-20 minutes, the good pesticide powder is fine, the precipitation is slow and less; the pesticide powder is coarse and the precipitation is much faster.
(2) Observation method:
If the powder pesticide has agglomerated, it is not easy to decompose, and it proves to be invalid and can no longer be used.
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