Published online by Cambridge University Press: 12 June 2017
Research conducted over 3 yr showed that volunteer Jerusalem artichoke was controlled effectively with clopyralid plus 2,4-D, dicamba plus 2,4-D, or 2,4-D alone applied postemergence at rates which did not injure spring barley. Glyphosate and paraquat applied preemergence to the crop did not reduce the number of Jerusalem artichoke shoots. Jerusalem artichoke which survived or escaped treatment was highly competitive with barley, as 4 to 6 surviving shoots/m2 could reduce seed yield 20%.