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问:有关农药的书中都指出:“配制波尔多液时不能用铁桶;熬制石灰硫黄合剂时不能用铜锅”。原因何在?既然不能与铁或铜接触,但喷药时用的喷雾器又都是铁和铜制成的,这是否有影响?答:1.配制波尔多液时不能用铁桶,主要是指溶解硫酸铜的容器不能用铁桶,因为硫酸铜与铁接触以后,所含的铜便和铁产生置换作用,这样硫酸铜中的铜成为金属铜,而铁器被腐蚀成为硫酸亚铁,其结果主要是破坏了波尔多液中所含的碱式硫酸铜成份,使得能溶解在水中起杀菌作用的铜化物减少,降低了药效。当然也腐蚀了铁
Q: The book on pesticides pointed out: “Preparation of Bordeaux mixture can not use iron drums; boil lime sulfur mixture can not use copper pot ”. The reason why? Since it can not be in contact with iron or copper, but when spraying the sprayer are made of iron and copper, is this affected? A: 1. Preparation of Bordeaux mixture can not use iron drum, mainly refers to the dissolution Copper sulfate container can not use iron drum, because after the contact of copper sulfate and iron, the contained copper and iron will have a displacement effect, so that the copper sulfate copper metal copper, and iron corrosion was ferrous sulfate, the results of the main Is to destroy the basic copper sulfate contained in Bordeaux mixture of ingredients, so that can dissolve in the water play a role in the reduction of copper compounds, reducing efficacy. Of course also corroded the iron