use of one or more group b antifungal and / or antibacterial and / or antiviral derivatives, synergistic antifungal and / or antibacterial and / or antiviral composition, curative or preventative control processes against crop phytopathogenic fungi and / or bacteria and / or against viruses.

摘要

Phosphorus acid derivatives and the like are used as an amplifier (potentiator) of plant defense responses induced by other materials (elicitors).