Pyrimisulfan is a new active ingredient by PBI Gordon. It is a Group 2 herbicide ALS inhibitor. It can also be used on a wide variety of both warm- and cool-season turfgrasses such as fine and tall fescues, Kentucky bluegrass, Bermudagrass, kikuyugrass, perennial ryegrass, bahiagrass, buffalograss, seashore paspalum, St. Augustinegrass (including improved varieties such as bitter blue and floratam), and zoysiagrass.