Remarks Although PNW data are preliminary, imazapyr, picloram, and glyphosate appear promising in initial trials.
Site of action (imazapyr) Group 2: acetolactate synthase (ALS) inhibitor; (glyphosate) Group 9: inhibits EPSP synthase; (picloram) Group 4: synthetic auxin
Chemical family (imazapyr) imidazolinone; (glyphosate) none generally accepted; (picloram) pyridine