The three key pests of cabbage and collards, the imported cabbageworm, Pieris rapae (L.); diamondback moth, Plutella xylostella (L.); and cabbage looper, Trichopulsia ni (Hübner), are commonly treated as a single caterpillar complex. In this study, we investigated the potential of using sex pheromone-based attract and kill formulations to control the cabbage caterpillar complex. Field experiments were conducted in fall 2003, spring 2004, fall 2004, and spring 2005 to evaluate two sex pheromone-based attract and kill (LastCallTM) formulations (IPM Tech. Inc., Portland, Oregon, USA): one for P. xylostella and one for T. ni. Attract and kill was compared to a Bt spray using the following parameters: captures of T. ni and P xylostella males in traps baited with conspecific pheromone lures, adult P. rapae populations, larval populations on plants, harvest damage ratings, and harvest yield. Our results suggest that the relative abundance of the pest species, among other factors, dictates the success of attract and kill tactic. Because of the unavailability of an attract and kill formulation for P. rapae, when populations of this species are high (specifically in the spring) attract and kill is not a successful control method for producing marketable cabbage or collards. However, in fall seasons when populations of P. rapae are low in comparison to T. ni and P. xylostella, an attract and kill provided control of the pests comparable to that of the Bt spray. This study stresses the importance of monitoring in the form of sampling and record keeping as part of a management program.