2,4-D (various products)
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 Phenoxy acetic acid
imazapic (Plateau)
Rate 0.5% solution as a spot treatment
Remarks Use a 1% v/v methylated seed oil as an adjuvant.
Caution Before using, note crop rotation restrictions.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Imidazolinone