Remarks Although PNW data are preliminary, metsulfuron, glyphosate, and imazapyr appear promising in initial trials. Must be treated in early spring as lesser celedine goes dormant by late spring.
Site of action (imazapyr, metsulfuron) Group 2: acetolactate synthase (ALS) inhibitor; (glyphosate) Group 9: inhibits EPSP synthase
Chemical family (imazapyr) imidazolinone; (metsulfuron) sulfonylurea; (glyphosate) none generally accepted