The invention relates to an oil suspension concentrate containing diflufenican, to salts of certain multivalent cations and to formulations embodied in the form of oil suspension concentrates comprising a) diflufenican, b) one or several solvents of hydrocarbon and vegetable oil groups, c) one or several non-surfactant salts of multivalent cations, wherein the product of solubility of said salts in water is greater than that of calcium sulphate, d) one or several surfactants and e) one or several thickeners. The inventive oil suspension concentrate is suitable for plant protection field.