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History of origin of copper sulphate
Fungicides (the name originates from Latin «fungus» — mushroom, fungus) — destroy agents of fungal diseases of plants.

For better protection of people fungicides are covered with copper sulphate or its products. Copper sulphate was among the first chemical substances used for fighting against plant diseases. Sulphate production in Russia started a little bit earlier, than in Europe, in 1725 at Lyalinskoe copper-smelting factory in the province of Perm. In Europe the first «sulphate manufactory» was founded only in 1769 in the French city of Rouen. In Russia at that time copper sulphate was named «dark blue» or «Turkish» stone.

It was believed that useful properties of copper sulphate as defender of plants were discovered by chance when Ireland was suffering from a famine caused by total devastation of potato crops by a potato disease (phytophthora). An observant reporter of a provincial newspaper noticed that potatoes on fields close to copper-smelting factories were not damaged by the disease whereas in other fields they turned rotten.

Bordeaux mixture — a product on the basis of copper sulphate for protection of plants, was discovered absolutely accidentally. French winemakers once addressed a request to chemist Joseph Louis Proust who at that time was already an honoured scientist to prepare any remedy to deter thieves from stealing ripening grapes from plantations. Proust responded to the request with a suggestion to use for this purpose a mixture of copper sulphate water solution and lime.

Bordeaux mixture — dark blue colour substance looked on berries of grapes like poisonous mould but didn't cause grapes any harm. It really was not found those who would like to break brushes of a grapes with such «mould».

A lot of time passed and in 1882 a French chemist Pierre Marie Alexis Millardet, passing by vineyards where Proust’s mixture was very frequently used, observed that here there were no even traces of grape decay. Bordeaux mixture, or Bordeaux liquid (as it is called now) in a short time was spread worldwide and used to spray not only grapevines, but also potatoes, tomatoes, onions, apple-trees and pears. In order to keep the Bordeaux mixture longer and so that copper combinations keep better on the leaves of plants at sprinkling, sugar or soap was added to it.

The Burgundy mixture — a mixture of copper sulphate and calcined soda (the crystalline decahydrate of sodium carbonate) is even more effective. The solution sticks to plants better, filtration is excluded and the sprayer clog is reduced.

Atáthe European exhibition ináMadrid copper sulphate ofáour enterprise has been awarded with aáprize for the best quality ináEurope.
People with allergic and skin diseases should avoid working with copper sulphate. While working, smoking is not allowed. After work the skin should be washed with soap.
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