farawayfarmer,
Found this from:
James A. McAfee, Ph.D.
Associate Professor and Extension Turfgrass Specialist
Dallas, Texas
Nutsedge (Nutgrass) and Bermudagrass Control in Ornamental Beds
"For post-emergent control of sedge, the herbicide imazaquin ( Image ) is labeled for purple and yellow nutsedge (commonly known as nutgrass").
Edited to add: Nut grass is not actually a grass.
Full Article:
http://aggie-horticulture.tamu...
