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农药混合使用好处很多,但并非所有农药都能混用。只有充分掌握农药的理化性质和混合后的反应等情况,才能合理使用。应注意以下几点:(1)遇到碱性物质分解、失效的农药,不能与碱性农药混用。如:乐果、敌敌畏、磷胺等,都是带中性或微酸性的加工品,在碱性液中迅速分解、失效,故不能与石硫合剂、波尔多液等碱性农药混用。(2)混后引起果树药害的农药和肥料,不能混用。波尔多液与石硫合剂混合后,产生多硫化铜,易造成药
Mixed use of pesticides has many benefits, but not all pesticides can be mixed. Only fully grasp the physical and chemical properties of pesticides and mixed response, etc., can be used properly. Should pay attention to the following points: (1) encounter alkaline decomposition, failure of pesticides, can not be mixed with alkaline pesticides. Such as: dimethoate, dichlorvos, phosphamidines, etc., are processed with neutral or slightly acidic products, the rapid decomposition of alkaline liquid, failure, it can not with lime sulfur mixture, Bordeaux mixture of alkaline pesticides. (2) Mix pesticides and fertilizers that cause fruit tree injury after mixing, can not be mixed. Bordeaux mixture of liquid and lime sulfur mixture, resulting in polysulfide copper, easy to cause medicine