Metsulfuron

Trade name(s) Escort XP, Ally, Cimarron, Purestand, and others

Manufacturer(s) Corteva, Bayer CropScience, FMC, Helena and others

Formulation(s) 60% dry flowable

Remarks A selective postemergence herbicide used at low rates to control broadleaf weeds in wheat, barley, and fallow. Escort is used for selective broadleaf weed and brush control in pastures, rangeland, and noncropland.

Water solubility 270 ppm at pH 4.6; 9,500 ppm at pH 6.7

Storage conditions Stable if kept dry.

Acute toxicity LD50 - greater than 5,000 mg/kg

Action in plant Interferes with an enzyme, resulting in rapid cessation of cell division in both roots and shoots.

Site of action Group 2: acetolactate synthase (ALS) inhibitor

Chemical family Sulfonylurea

Koc Average is 35 mL/g at pH 7