The disclosure relates to adjuvant compositions and related methods for reducing herbicide volatility. The adjuvant- and herbicide-containing herbicide compositions are generally aqueous and include a volatile growth regulator herbicide and a monosaccharide adjuvant. When the compositions are applied to a target area to control a herbicide-sensitive target plant in the area with the herbicide, the monosaccharide adjuvant reduces volatile transport of the herbicide, thus reducing damage to other (non-target) sensitive plants, whether inside or outside of the target area of application.