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1.观察法。粉剂或可湿性粉剂,如果外表显现受潮特征,药粉呈团状,或压一压湿气重甚至结块者,表明药效已丧失。液剂若静置后浑浊不清或有絮结沉淀,说明已失效变质。乳剂如静置后出现油水分层或发生絮结及沉淀,也是失效变质的表现。2.加热法。把已生成沉淀的液剂或乳剂农药连瓶放进热水中,经1小时后,失效农药的沉淀物不
1. Observation method. Dust or wettable powder, if the appearance of damp characteristics appear, the powder was clumped, or pressure and pressure of a wet or even agglomeration, indicating that the efficacy has been lost. If the liquid after standing turbidity or flocculation precipitate, indicating that the deterioration has deteriorated. Emulsion as standing oil or water after stratification or flocculation and precipitation, but also the performance of failure metamorphism. 2 heating method. The precipitate has been generated liquid or emulsion pesticide bottles into the hot water, after 1 hour, the failure of pesticide sediment is not