Hexaflumuron was evaluated as a toxicant and reproduction inhibitor at 5, 10, 25, 50 and 100 ppm (ai weight:volume basis) in a mixture with 10% sucrose as a feeding stimulant for spring and fall pheromone trap-captured female boll weevils (BW), Anthonomus grandis grandis Boheman. Subsequent to feeding, the weevils were evaluated for fecundity and larval hatch of eggs. Compared to 10% sucrose alone, the gustatory response was significantly depressed at concentrations of 25 ppm and above for females captured in the spring. Similarly, gustatory response decreased significantly at concentrations of 5 ppm and above for females captured in the fall. Female weevils captured in the fall ingested significantly more of all test and control solutions than those captured in the spring. There was no evidence of toxicity that resulted in death of treated female BWs. Mean number of eggs per female were significantly lower for females fed all hexaflumuron concentrations compared to control for spring-captured weevils. In the fall, there was more variability in the mean number of eggs laid between treatments than in the spring. In the spring, percent larval hatch of eggs was significantly less at concentrations of 10 ppm and above compared to control while in the fall, larval hatch of eggs was more variable and differed significantly from control at concentrations of 25 ppm and above. The potential of hexaflumuron for use as a toxicant or reproduction inhibitor in a feeding stimulant/attracticide formulation against BW populations in pre- or post-eradication areawide suppression programs appears to be limited because of the inhibition of gustatory response compared to control at concentrations which significantly reduce fecundity and fertility.