Bursage, woolyleaf (Ambrosia grayi)

dicamba (Banvel, 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