A Heliothis spp. susceptible cotton cultivar (DPL 41) and partially resistant cotton strain (La. HG-660) were treated either with a larvicide, lambda-cyhalothrin (0. 028 kg AI/ha); an ovicide, thiodicarb (0. 28 kg AI/ha), or allowed to remain untreated (UTC) to evaluate host plant resistance combined with insecticides to manage Heliothis spp. All cultivar * insecticide combinations significantly reduced terminal, square and boll damage due to Heliothis spp. below that observed in the susceptible cultivar without insecticide. The resistant line retained significantly more total bolls during the season and matured significantly earlier than the susceptible cultivar. The susceptible cultivar and resistant strain * larvicide combinations yielded significantly more seed cotton and lint than the respective cultivar and strain without insecticide.