Clopyralid

Trade name(s) Stinger,Transline, Clopyr Ag

Manufacturer(s) Corteva

Formulation(s) 3 lb/gal soluble concentrate

Remarks A highly translocated, selective herbicide active primarily through foliage of broadleaf herbaceous weeds (mostly the Asteraceae, Fabaceae, and Polygonaceae families). Curtail is clopyralid + 2,4-D; Redeem R&P and Confront are clopyralid + triclopyr.

Water solubility 1,000 ppm

Storage conditions Store above 28°F or warm to 40°F and agitate before use.

Acute toxicity LD50 - 4,300 mg/kg

Action in plant Mimics natural plant hormones.

Site of action Group 4: synthetic auxin

Chemical family Pyridine

Koc Average is 6 mL/g, but ranges to 60 mL/g (increased soil sorption with time)