Method for identifying whether a pesticide has failed
The China Pesticide Network Xiaobian gives you a detailed description of the methods for identifying whether pesticides are ineffective: intuitive method, heating method, floating method, and dissolution method. Here you can find the related products in Paperless Recorder, we are professional manufacturer of paperless recorder,Paperless Graphic Recorder,Paperless Recorder Price,Paperless Temperature Recorder. We focused on international export product development, production and sales. We have improved quality control processes of Paperless Recorder to ensure each export qualified product. Paperless Recorder,Paperless Graphic Recorder,Paperless Recorder Price,Paperless Temperature Recorder Xi'an Gavin Electronic Technology Co., Ltd , https://www.gaimc-meas.com
1. Intuitive method: For powder pesticides, first look at the appearance of the medicament. If it is agglomerated by moisture, the taste of the medicine is not strong or has other odors, and it can be pinched into a group, indicating that it has basically failed; for the emulsion pesticide, the medicine bottle is inverted first. If the liquid is turbid or stratified (ie, oil-water separation), there is sediment formation or flocculation, indicating that the agent may have failed.
2, heating method: suitable for powder pesticides. Take 5-10 grams of pesticides and heat them on a metal piece. If a large amount of white smoke is produced, and there is a strong pungent smell, it means that the medicine is good, otherwise it indicates that it has failed.
3, floating method: suitable for wettable powder pesticides. First take 200 grams of water in a container, then take 1 gram of pesticide, gently spread evenly on the water surface, carefully observed, wet and soluble in water within 1 minute is an un-attenuated pesticide, otherwise it is a pesticide.
4, suspension method: suitable for wettable powder pesticides. Take 30-50 grams of pesticides, put them in a glass container, add a small amount of water to make a paste, then add 150-200 grams of water and mix well. Observe for 10 minutes. The pesticides that have not failed are well soluble. Small, slow sedimentation rate and low sedimentation.
5, dissolution method: suitable for suspension pesticides. Put the pesticide with the precipitate into the warm water (temperature 50-60 ° C), observe it after one hour, if the precipitate dissolves slowly, it means that the medicament has not expired, otherwise it means it has failed.
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