Remarks Control is unknown, although metsulfuron appears promising in initial trials. Other data suggest glyphosate at 1.5 lb ae/A and picloram at 1 lb ae/A are effective.
Site of action (metsulfuron) Group 2: acetolactate synthase (ALS) inhibitor; (glyphosate) Group 9: inhibits EPSP synthase; (picloram) Group 4: synthetic auxin
Chemical family (metsulfuron) sulfonylurea; (glyphosate) none generally accepted; (picloram) phenoxy acetic acid