A fungicidal composition and method for the protection of vines against disease are provided. The composition which is applied to vines contains as active material a mixture of 1 part by weight of a monoester salt of a phosphorous acid of the formula ##STR1## in which R is an alkyl radical having 2 to 4 carbon atomsMe is an alkali metal, alkaline earth, or aluminum atomn is a whole number from 1 to 3 equal to the valence of Meand from 0.05 to 8 parts of at least one contact fungicide selected from the group consisting of compounds having a base of copper, the metallic ethylene bisdithiocarbamates, and the derivatives of phthalimide.