Clematis, oriental (Clematis orientalis) and old man's beard (Clematis vitalba)

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