Emergence, survival, and fecundity of adult cat fleas (Siphonaptera : Pulicidae) exposed as pupae to juvenile hormone mimics

Cat flea, Ctenocephalides felis felis (Bouche), adults exposed to sprays of methoprene, pyriproxyfen, or fenoxycarb as cocooned pupae emerged approxim ate to 1 d earlier than adults from water-treated control pupae. Mortality of adult fleas, after exposure to juvenile hormone mimics as pupae, was inc reased over that of controls. Females had higher mortality than males withi n the first 48 h of feeding. Fecundity of females exposed as pupae to juven ile hormone mimics was not different from that of controls. Early emergence of preemerged adults from treated cocoons is discussed along with reasons for higher female susceptibility to juvenile hormone mimics.