We treat fungal diseases with sulfur and copper. Both substances can be natural or synthetic. The natural ones come from a natural stone. Synthetic products produced in a chemical industry. Once the treatments have been done, these substances eventually go to the ground. Sulfur because it is inorganic. However, copper is a heavy metal, and where to pile it there. If administered without measure, the contamination increases. It has enough work even if it's used in size. In the last black we will contaminate the plants, the lands, the waters and ourselves. Both sulphur and copper must be used as little as possible.
There is not much chance of dealing with disease. Prevention is the most effective, working in two ways: choosing the most resistant and resistant varieties to plant diseases and, on the other hand, opposing the moisture that removes them.
With this panorama there are many people, here and there, dedicated to plant health. Many possibilities of fungicide that deactivate fungi have already been proven: dairy, ash, propolio, bicarbonates, oxygenated water... They all work the same way: dry and hinder the skin of the plant. The waters of plants containing silica are also used: azeribuztana and nettle. The first strengthens the plant to fight the disease. The second, despite the illness, turned around and resuscitated.
I have recently heard of another interesting remedy to combat the oidium or the white: Plant cuckoo apples of the genus Quercus. It dries dry and spreads the powder over the plant. Goodbye!