Weed Response to Glufosinate Applied Alone or Mixed with 2,4-D or Dicamba In Georgia, North Carolina, and Tennessee

Cotton production has been changed for ever by glyphosate-resistant Palmer amaranth.  Greater glufosinate use and the development of cotton resistant to 2,4-D or dicamba will be critical for the management of this resistant pest in the future.   Although glufosinate, 2,4-D and dicamba can control many weeds, Palmer amaranth is a challenge to control by these herbicides when applied alone.  A study was developed to determine if combinations of glufosinate plus 2,4-D or dicamba would be more effective in controlling Palmer amaranth.