diuron (several trade names)
Western Oregon, red clover only
Rate 1.6 lb ai/A
Time Apply when red clover is semi-dormant, from October 15 to December 15.
Remarks Controls annual grass and broadleaf weeds such as annual bluegrass, chickweed, hawksbeard, rattail fescue, annual ryegrass, and seedling velvetgrass.
Caution Apply to red clover only. Stands should be established at least 9 months and in vigorous condition. Do not replant to any crop within 1 year after application to limit potential for rotational crop injury.
Site of action Group 7: photosystem II inhibitor
Chemical family Substituted urea
oxyfluorfen (Goal 2XL)
Oregon (OR-050028) and Idaho (ID-100004) only, red and white clover
Rate 0.03 to 0.09 lb ai/A (2 to 6 fl oz/A Goal 2XL)
Time Apply to established dormant clover from December 1 to February 15.
Remarks Controls broadleaf weeds including common mallow, groundsel, filaree, henbit, and speedwell.
Caution Apply to red and white clover for seed only. Apply preemergence or up to six-leaf stage of weeds. Do not feed or graze clover after applying. Do not cut treated clover for hay or forage. Do not use harvested seed for sprouting. Processed seed must be labeled "not for human or animal consumption." Do not rotate to a small grain crop for 10 months, to avoid crop injury due to herbicide carryover. See label for additional crop rotation restrictions.
Site of action Group 14: protoporphyrinogen oxidase (PPO) inhibitor
Chemical family Diphenylether
pelargonic acid (Scythe)
Rate Apply a 3% to 10% solution (v/v) in a 75 to 200 gal/A spray solution.
Time Apply when clover is dormant to control actively growing weeds. All partially green foliage will be killed or stunted, but activity may be limited with cool weather after application.
Remarks Use higher rates to control perennial weed species or when maximum vegetative burndown is desired. Adequate spray coverage is essential to maximize activity. Scythe is not translocated throughout plants, and is a nonselective contact material.
Caution Do not apply Scythe through any type of irrigation equipment. There are no grazing, feeding, or plant back restrictions associated with Scythe applications.
Site of action Group 26: unknown