Penoxsulam is an acetolactate synthase inhibitor herbicide. It provides broad-spectrum control of many annual, biannual, and perennial weeds.
It is used mainly as a post-emergency foliar spray or a granular formulation for the control of broadleaf, sedge, and grass weeds in transplanted, dryseeded, and water-seeded rice. It is also effective against broadleaf weeds in corn, sorghum, wheat, barley and other cereal crops, lawns, golf courses, parks, cemeteries, athletic fields, sod farms, tree and vine crops, range and pasture, roadsides, and other crop and non-crop uses.
As penoxsulam does not bind strongly to either soil or sediments, it tends to be very mobile in both aqueous and terrestrial environments, which makes it a contaminant to groundwater. Penoxsulam is registered for use in Germany, France, Portugal and the USA.
