From 1858 to 1863, the main producing area of ​​French grapes was a kind of pest that resembled a green-yellow locust called a grape vine. This pest is attached to grafted grape branches and passed from the United States. Wine is a famous name in France. Due to the emergence of such pests, the grapes are greatly reduced in output, and farmers are crying out.
In 1876, Permalia, a professor of botany at the University of Bordeaux, Permichalyad Lud (1838 - 1902) could not bear to witness this terrible situation in the area, abandoned pure scientific research and began to study ways to prevent this pest. He succeeded in alleviating disasters by using American grapes that had a strong resistance to the pests and diseases as rootstocks, and then grafting European varieties of fine-grained grapes to scion.
However, the disease (also known as degerosis) that was introduced at the time of the introduction of the Portuguese tapir began to spread. This is a grape disease caused by a mold.
One day in October 1882, Miyalud passed through the martyrdom in the vineyard near Bordeaux. I saw the endless vine withered by depigmentation, and Miyalude was very sad. However, he discovered a strange phenomenon. The vines on the rampage were not infected and grew very dense. This line of grapes sprayed Bordeaux mixture to prevent people passing by from stealing food. This solution is a mixture of copper sulphate and lime. It looks green and seems poisonous. Those who walked fear that the grapes are poisonous. No one dares to pick it.
Miyalud felt puzzled. He suddenly remembered whether it was because of the effectiveness of Bordeaux mixture in preventing parasites and mold reproduction. When he returned to college, he immediately began to study.
After three years of hard work, he found out the reason why Bordeaux's liquid was used to prevent the reproduction of mycobacterial molds. That is, in the Bordeaux mixture, the dissolution of copper sulphate produces copper ions, which can prevent the development of spores of fungal spores. Therefore, molds cannot reproduce.
During that time, the epidemic of degerosis was temporarily contained. But by 1885 it began to spread again. For this reason, Miyaluud started a large-scale experiment. He divided a large vineyard in two, half sprayed Bordeaux solution, and the other half sprayed nothing. Soon, grapes that had not been sprayed were stained with degerosis, and grapes that had been sprayed with Bordeaux solution were almost completely free of disease.
French vine growers immediately adopted Bordeaux fluid, which reduced the degerming disease. As the news spread, Bordeaux fluid has not only been used in Europe but also in the world and has received very great results.