The vine is a demanding and fragile plant which needs a lot of care. It is sensitive to a few well-known fungi, including downy mildew, powdery mildew and black rot, which must be controlled with preventive treatments.
In order to fight against these diseases and following the industrialization of agriculture, plant protection products including synthetic chemical molecules (pesticide) have been created. About 260 molecules are found in nature, which does not necessarily know how to assimilate them. Environmental and public health problems arise.
These molecules replaced the natural molecules of copper and sulfur.
Copper is mainly used to treat mildew. If used in high concentrations, it is harmful to soil microorganisms; but if used in small amounts, its impact is greatly reduced.
As for sulfur, it is a mineral element easily assimilated by soils.