Laboratory tests were conducted with five synthetic pyrethroids, two organophosphates, and one carbamate insecticide to determine the effects of sub-lethal doses on mating, mortality, and fecundity of pink bollworm moths, Pectinophora gossypiella (Saunders). Male or female moths were treated when 24 hr old and crossed with similarly treated or untreated individuals of the opposite sex. After a 24-hr mating period, mating was reduced up to 100% by the synthetic pyrethroids Bayer FCR-1272, fenpropathrin, and flucythrinate. Reductions in mating after treating with fenvalerate and permethrin were not nearly as great. Reduced incidence of mating after treating with carbaryl, methyl parathion, or trichlorfon was usually associated with high mortality. Incidence of mating after a 72-hr mating period was greater than after the 24- hr period; reduced percentage mating was associated with high mortality. Fecundity was reduced by most treatments, but may be associated with high mortality of the treated sex. When males only were treated, the reduced fecun dity of the untreated females was due to their unmated condition.