Trade name(s) Cleat, Express, Luxxur A, Taquet, Victory
Manufacturer(s) Corteva, NuFarm, Rotam,
Formulation(s) 75% dry flowable, 50% granules
Remarks A selective, postemergence herbicide with short soil persistence used at low rates to control certain broadleaf weeds in wheat and barley. Harmony Extra is tribenuron + thifensulfuron.
Water solubility 28 ppm at pH 4; 280 ppm at pH 6.
Acute toxicity LD50 - greater than 5,000 mg/kg
Action in plant Interferes with acetolactate synthase, resulting in a rapid cessation of cell division and plant growth in both shoots and roots.
Site of action Group 2: acetolactate synthase (ALS) inhibitor
Chemical family Sulfonylurea
Koc Average is 46 mL/g pH 6.6