1. If the powder powder absorbs moisture and agglomerates during storage, it needs to be placed in a cool and ventilated place to dry. Do not use it in the sun or crush it. If the cake is more serious, it can only be used for toxic soil.
2. Wettable powder Take 1 part of wettable powder, add 200 parts of water, hold it in a glass measuring cylinder, shake it for a while and observe the suspension. If the drug precipitates slowly, the suspension is good. If the quality is not good, 0.10% neutral detergent should be added before use to increase the wet spread. If the wettable powder absorbs moisture and is hard, it should not be used as a spray.
Third, the emulsion emulsion pesticides in the storage process, if the storage is not good, the following three situations may occur. One is the agglomeration phenomenon. If the emulsified oil has a non-flowing viscous liquid or has formed a soapy solid, it proves that the solvent has been mostly volatilized and the quality has changed and cannot be used. The second is the precipitation crystallization phenomenon. The emulsion stored for a long time will have white crystals on the bottom of the bottle or turbidity. If the emulsified oil is immersed in the warm water of 30-40 ° C, the crystallization will dissolve in about 30 minutes. It is a transparent liquid, indicating that the quality is still good. It can be used. If it cannot be dissolved, it indicates that the quality of the cream has changed and cannot be used. The third is the change of emulsification performance of the emulsifiable concentrate. Take 1 part of emulsifiable concentrate, add 200 parts of water, put it in the glass measuring cylinder, shake it and let it stand for about half an hour. Observe the emulsification. If there is no oil slick in the upper layer, there is no sediment in the lower layer, no obvious oil beads in the middle. It shows that the emulsification performance is good. If there is oil slick on the top, there is sedimentation. After 10 minutes, there is delamination, which indicates that the emulsion is destroyed and cannot be used.
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