A method of controlling sprout formation in tubers includes application of CIPC and carvone or application of CIPC and benzothiazole and then storing the treated tubers. In a preferred embodiment of the method, tubers to be placed in storage are treated with a composition of CIPC and carvone or CIP and benzothiazole utilizing thermal fogging techniques, with the average effective residue of CIPC on the tubers of approximately 16.6 ppm. When the tubers are to be used to growth tuber-producing plants, for example, when the tubers are to be used as seed potatoes, after removal from storage, the seed potatoes are treated with ethylene at planting, thereby stimulating sprout growth.