Atlas 43 SC belongs to the group that interferes with ergosterol biosynthesis, very specifically inhibiting demethylation at C14. The inhibition of ergosterol biosynthesis, which is a natural constituent of cell walls, causes considerable disruption to the multiple functions of the membranes, which leads to the loss of functionality of the membrane and, as a final result, the total halt of the internal growth of the fungus. 1) Curative Action: Curative action is understood as the inhibition of the development of the fungus before producing the infection (pre-symptom) and not after it.