Four insect growth regulators (IGRs), Confirm, Cyromazine, Fenoxycarb and Pyriproxyfen were evaluated as toxicants in mixtures with 1 M sucrose on a ppm AI weight:volume basis as a feeding stimulant for bollworm (BW), Helicoverpa zea (Boddie), adult control. Sex pheromone trap-captured males were evaluated for effects on proboscis extension response only and laboratory-reared females were evaluated for effects on gustatory response, mating frequency, fecundity, larval hatch and development. Confirm at 1, 10, 100, 1000, and 10,000 ppm concentrations did not significantly reduce proboscis extension and gustatory responses, mating frequency, larval hatch and development compared to control (sugar only). Cyromazine and Fenoxycarb significantly reduced gustatory responses at 10,000 and 1000 ppm, respectively. Cyromazine significantly depressed mating frequency at 10,000 ppm compared to 1 and 10 ppm, but there was no difference in mating frequency between 10,000 ppm and control. Fenoxycarb significantly reduced mating frequency at 1 ppm compared to 100 ppm, but mating frequency either at 1 or 100 ppm was not significantly different from control. Pyriproxyfen significantly reduced only proboscis extension response at 100 and 1000 ppm and mating frequency at 1000 ppm compared to control. Because none of the IGRs significantly reduced larval hatch or development, these results indicate that the potential for use of these IGRs as toxicants for adult control of BW is limited.