Trade name(s) Armezon, Frequency, Impact, Pylex,
Manufacturer(s) Amvac Chemical Corp., BASF
Formulation(s) 2.8 lb/gal suspension concentrate
Remarks Topramezone is a novel 4-HPPD inhibitor herbicide for postemergence weed control in corn. It is effective against most major broadleaf weeds and has good activity on a number of grass weed species common to corn, including wild proso millet, while displaying excellent tolerance to all types of corn.
Water solubility 15,000 ppm at pH 7
Storage conditions Store in a cool, dry place. If below freezing, agitate or mix contents of container well before use.
Acute toxicity LD50 - greater than 2,000 mg/kg
Action in plant Inhibits HPPD enzymes.
Site of action Group 27: inhibits 4-hydroxyphenylpyruvatedioxygenase (4-HPPD)
Chemical family Triketone
Koc Average is 22.3 to 172.4 mL/g