The materials currently used for the control of axillary buds in Canada are formulations of either n-decanol or mixtures of n-octanol and n-decanol. The recommended applications to flue-cured tobacco are at the elongated bud stage of development and approximately one week later. A four-year study showed that yield was generally increased by approximately 100 kg/ha and monetary returns by $420/ha, and sucker numbers and weights were significantly reduced, with two applications as compared to a single application of either n-decanol or mixtures of n-octanol and n-decanol. Most agronomic parameters, such as total alkaloids, reducing sugars, lamina weight, grade index, and leaf dimensions, were not significantly affected by the contact sucker control materials.