Over 500 male tobacco budworm moths were bioassayed from April through October 1991 against 10 or 30 µg/vial doses of cypermethrin. Although average pyrethroid resistance levels recorded during the months of April, May and June of 1991 were higher than that observed during those same months of the previous four years, the average pyrethroid resistance levels for July, August, September and October of 1991 did not exceed those previously reported. During the first four years (1987-1990) of the monitoring program in Louisiana, overall pyrethroid resistance levels increased each year. Thus 1991 is the first year that overall levels of pyrethroid resistance in the tobacco budworm did not increase. Probably the main factor responsible was low tobacco budworm population pressure over most of Louisiana. As a result, only a few tobacco budworm field control failures were reported in 1991. Over 5400 bollworm moths were bioassayed against 1, 2 or 5 µg/vial doses of cypermethrin during 1991. Data from these bioassays are similar to that obtained in 1988, 1989 and 1990 and indicate that bollworms remain susceptible to pyrethroids.