Synergistically active herbicidal mixtures

The present invention relates to a synergistically active herbicidal mixture composed of a sulfonylurea derivative (a) of the formula I and one or more herbicidal compounds b1 to b41. A composition which comprisesa) at least one sulfonylurea of the formula I wherein the radicals Rto Rand the index n are as defined in the specification, or an environmentally compatible salt of the sulfonylurea, andb) at least one herbicidal compound selected from groups bto bas defined in the specification, or an environmentally compatible salt of the herbicidal compound,and which exhibits a synergistic herbicidal effect.