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近年来,由于进口农药减少、原料不足等原因,农药供应十分紧张,价格暴涨,假冒农药急剧增加。有用沙子加颜料生产的假呋喃丹,有用硫酸亚铁冒充硫酸铜等等。很多群众由于缺乏鉴别能力,往往拿高价买假药,不但浪费了钱,还由于病虫得不到控制,给农业生产带来很大损失。现介绍一些农药的简易鉴别方法,供参考。一、1605乳油红褐色液体,具有大蒜臭的气味,很容易与水混合形成透明或半透明并略带浅绿色乳剂。可取少量的肥皂水或碱水,放在玻璃管或玻璃瓶中,加入被鉴定的农药样品乳油1～2滴,摇动后溶液即成黄色。再加入几滴硫酸或盐酸,摇动后,黄色又逐渐消失,即证明被鉴定样品是1605乳油。二、乐果乳油褐色或黄棕色油状液体,有一种臭味。可取少量试液溶入20毫升
In recent years, due to the reduction of imported pesticides, raw materials and other reasons, the supply of pesticides is very tight, soaring prices, a sharp increase in counterfeit pesticides. Useful sand plus pigment production of pseudo-carbofuran, useful ferrous sulfate as copper sulfate and so on. Because of the lack of identification capacity, many people often take high prices to buy counterfeit medicines, which not only waste money, but also cause great losses to agricultural production due to the unmanageable diseases and pests. Now introduce some simple identification of pesticides for reference. First, 1605 cream red brown liquid, with the smell of garlic odor, it is easy to mix with water to form a transparent or translucent and slightly light green emulsion. Desirable a small amount of soap or alkaline water, placed in a glass tube or glass bottle, adding pesticide samples were identified 1 to 2 drops of emulsifiable concentrate, the solution was yellow after shaking. Then add a few drops of sulfuric acid or hydrochloric acid, shaking, the yellow and gradually disappear, that is certified sample is 1605 EC. Second, dimethoate brown or yellow brown oily liquid, there is a smell. Desirable a small amount of test solution into 20 ml