A composition for control of diseases on useful plants or on propagation material thereof caused by phytopathogens, that, in addition to customary inert formulation adjuvants, comprises as active ingredient a mixture of component (A) and a synergistically effective amount of component (B), wherein component (A) is Cyprodinil; and component (B) a compound selected from compounds known for their fungicidal activity, is particularly effective in controlling or preventing fungal diseases of useful plants.