Experiments conducted in a pasture agroecosystem in central Florida showed that two-component lures composed of acetic acid and 3-methyl-1-butanol placed in Unitraps collected adults of three species of grass looper. Mocis disseverans (Walker), M. latipes (Guenée), and M. marcida (Guenée) males and females were collected from July through November, with peaks from late September through late October. Other noctuid moths also were captured, but constituted less than 33% of the total moths collected. In 2001 and 2002, 67.7 and 72.4% of the Mocis spp. moths collected were females, respectively. Phenylacetaldehyde-baited traps collected fewer Mocis spp. moths. The trapping system suggested by our results will aid growers in monitoring for a pest complex that lacks commercially-available sex pheromone lures.