dicamba (Rifle or Clarity)
Rate 2 to 4 lb ae/A
Remarks Reported to control this plant, although data are lacking in the Pacific Northwest. Follow label instructions.
Site of action Group 4: synthetic auxin
Chemical family Benzoic acid
imazapyr (Arsenal)
Rate 1 lb ae/A
Remarks Reported to control this plant, although data are lacking in the Pacific Northwest. Follow label instructions.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Imidazolinone