The invention relates to the field of agriculture. It concerns an unexpected synergistic activity resulting from a combined use of peracetic acid and at least one SAR inducer which is a water soluble silicate salt defining a source of silicate ions, for the control of pathogens into and on a plant tissue of a growing plant. Also, the invention relates to a water soluble mixture or composition (especially a powdered composition) comprising a peracetic precursor system and at least one SAR inducer which is a water soluble silicate salt defining a source of silicate ions, which once admixed with water, allow the control of pathogens in and onto a plant tissue of a growing plant. Also, the invention relates to uses and methods involving said water soluble mixture or composition, and a kit comprising said water soluble mixture or composition.
