Trials were conducted in 2003 and 2004 to evaluate the efficacy of nine corn hybrids containing three Cry1Ab events, and two Cry1Ab events stacked with a VIP event, for controlling southwestern corn borer (SWCB), Diatraea grandiosella Dyar, and corn earworm (CEW), Helicoverpa zea (Bobbie). Syngenta supplied the seed used in these trials. In 2003 the efficacy of the Cry1Ab experimental events against SWCB was outstanding and seemed equal to that of current commercial Bt11 hybrids. The efficacy of the VIP event stacked with Cry1Ab against CEW was also outstanding. Data from 2004 will be added as it become available.