FIELD: plant growing, agricultural chemistry. SUBSTANCE: invention proposes composition used for plants protection and method for treatment of plants in manufacture of plant growing production. Method involves treatment of plants with indicated composition. Composition used in the method comprises at least one toxic substance and at least one salt of arachidonic and/or jasmonic and/or eicosapentaenic acid with alkaline metal or ammonium. Invention allows to simplify preparing working solutions and to enhance their stability to separation being without reduction of biological effectiveness of treatment. EFFECT: improved treatment method. 3 cl, 3 tbl, 11 ex
