New use of antifungal compounds and / or antibacterial and / or ativirales.

Using one or more antifungal and / or antibacterial derivatives and / or antiviral B chosen from the list comprising phosphorous acid comprises or its derivatives and its alkali or alkaline earth salts, acibenzolar-S -5 methyl, chitosan, aminobutyric acid, as amplifier (potentiator) of the physiological responses of plants obtained after application of one or more elicitors a; it can not be used simultaneously as potentiator.