Transgenic varieties resistant to Heliothis virescens are new tools to reduce production costs due to insecticide application and to diminish environmental contamination. They have been implemented in the Yaqui Valley since 1998. In this valley, infestation levels of budworms do not reach the threshold level most of the time. New varieties were evaluated in 1999, under this condition, the outstanding yield performance of NuCOTN 33B and DELTAPINE 458 BRR is based on their overall genetic merit.