Field experiments were run to compare performance and persistence of 1-g baits made from PVC sheets that contained 7.5 mg of Z-11-hexadecenal (Zll-16AL) and Z-9-tetradecenal (Z9-14AL) in a 15:1 ratio, with or without 0.0187 mg Z-11-hexadecen-1-ol (Zll-16:OL). Capture of Heliothis virescens (TBW) in traps was used as a measure of performance. Lures with Zll-16:OL caught significantly more TBW than lures without Zll-16:OL when compared for two weeks in different regions with high or low population densities. Tests with new baits run simultaneously with baits aged for 2-wks or 4-wks indicated that enhancement caused by Zll-16.OL diminished to insignificant levels after two wks of use. In all tests comparing the two formulations, frequency (%) that at least one TRW was captured per trap per night was highest when lures with ZII-16:OL were used, even when the lures were 6 wks old.