WEED CONTROL Herbicide Residue Accent (nicosulfuron) may have a residue the year following application to corn. Rotational crop restrictions for Accent are found on page 64 of the 1996 North Dakota Weed Control Guide in the table, "Rotation Restrictions for Crops Grown in North Dakota." All other rotational crops may be seeded 18 months or more after Accent application on soils with pH 6.5 or greater and after 10 months on soils with pH less than 6.5.