aminocyclopyrachlor + chlorsulfuron (Perspective)
Rate 1.2 to 1.8 oz/a aminocyclopyrachlor + 0.5 to 0.7 oz/a chlorsulfuron (3 to 4.5 oz/a of product)
Time Apply to actively growing vegetation.
Remarks Adjuvants can be used; these include methylated seed oils 0.5 to 1% v/v, nonionic surfactants at 0.25 to 1% v/v, and crop oil concentrates at 1% v/v. Can be applied using an invert emulsion rather than water.
Caution Even low rates can kill nontarget tree and shrub species, so avoid application within a distance equal to the tree height of the sensitive species. Do not allow spray to drift off target. Can injure several grass species including bromes, as well as basin wildrye.
Site of action (aminocyclopyrachlor) Group 4 synthetic auxin; (chlorsulfuron) Group 2: ALS inhibitor
Chemical family (aminocyclopyrachlor) Pyrimidine carboxylic acid; (chlorsulfuron) Sulfonylurea
diflufenzopyr + dicamba (Overdrive)
Rate 0.175 to 0.35 lb ae/a (4 to 8 oz/a)
Time Apply to actively growing plants.
Remarks For improved uptake if weeds are under moisture or temperature stress, use a nonionic surfactant or a methylated seed oil.
Caution Do not plant any crop within 30 days of application. Do not exceed 10 oz/a of Overdrive per season.
Site of action (diflufenzopyr) Group 19: inhibits indoleacetic acid transport; (dicamba) Group 4: synthetic auxin
Chemical family (diflufenzopyr) Semicarbazone; (dicamba) Benzoic acid
MCPA LV ester or MCPA amine
Rate 1.5 lb ae/a
Time Apply when the buttercup is growing well.
Remarks Avoid drift to sensitive crops and desirable vegetation.
Site of action Group 4: synthetic auxin
Chemical family Phenoxy acetic acid