Objective factors such as temperature, humidity, rain, light, wind, soil properties and other environmental factors directly affect the physiological activities of pests and diseases and the performance of pesticides , the results will affect the efficacy of pesticides.
The chemical composition, physical and chemical properties, mechanism of action, dosage and processing properties of pesticides may directly or indirectly affect the efficacy of the pesticide.
What should I do with the failed pesticide?
If the powder powder absorbs moisture and agglomerates during storage, it needs to be placed in a cool and ventilated place to dry, and can be used after crushing. If the agglomeration is serious, it can only be used for toxic soil.
Wettable powder
1 Take 1 part of wettable powder, add 200 parts of water, hold in a glass cup, shake for a certain period of time, observe the suspension, if the precipitation of the drug is slow, it means that the suspension is good;
2 In case of poor quality, silicone additives or 0.1% 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.
Emulsifiable oil
1 changes in the emulsifying properties of the cream. Take 1 part of emulsifiable concentrate, add 200 parts of water, put it in a glass cup, 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 precipitation in the lower layer, and there is no obvious oil bead in the middle, indicating that the emulsification performance is good. If there is emulsifiable concentrate, there is sedimentation, and there is delamination after 10 minutes, indicating that the emulsion is destroyed and cannot be used;
2 agglomeration phenomenon. If the emulsified concentrate 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;
3 precipitation crystallization phenomenon. For long-term storage of the emulsion, there will be white crystals on the bottom of the bottle or turbidity. If the emulsified milk bottle is immersed in warm water of 30 ° C ~ 40 ° C, the crystallization can be dissolved in about 30 minutes, and it will return to a transparent liquid, indicating that the quality is still good and can be used. If it does not dissolve, it indicates that the quality of the cream has changed and cannot be used.
More pesticide knowledge , please pay attention to China Pesticide Network
Three Way Valve Balls,Stainless Steel Three Way Valve Spheres,Steel Three Way Valve Spheres,Stainless Three Way Valve Spheres
WENZHOU ZHENHONG VALVE BALL CO., LTD , https://www.zhvalveball.com