Herbicidal compositions and methods using a combination of (a) a compound of formula (I): (structurally represented) or an agriculturally acceptable salt or ester thereof and (b) picloram or an agriculturally acceptable salt or ester thereof provide control of undesirable vegetation in e.g. rice wheat barley triticale oats rye sorghum com or maize oilseed rape vegetables pastures grasslands rangelands fallowland turf tree and vine orchards aquatics industrial vegetation management or rights of way.