Mesotrione

Trade name(s) Callisto

Manufacturer(s) Syngenta

Formulation(s) 4 lb/gal suspension concentrate

Remarks Mesotrione is a synthetic relative of natural herbicides produced by the plant Callistemon citrinus. Controls broadleaf weeds in corn.

Water solubility 15,000 ppm

Storage conditions Can be stored as low as 20°F.

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

Action in plant Inhibits HPPD enzymes essential to photosynthesis.

Site of action Group 27: inhibits 4-hydroxyphenylpyruvatedioxygenase (4-HPPD)

Chemical family Triketone

Koc 14 - 390 mL/g