[Influence of growth development inhibitors on the reproduction of Musca domestica (Diptera: Muscidae)]

An experiment with a strain of Musca domestica susceptible to insecticides and treated with different doses of 2 insects' development inhibitors: Juvenon and S-31183, was carried out. These compounds were added to food supplied to third-stage larvae. On calculating dosage-mortality lines, it was found a greater biological activity in S-31183. Those surviving DL90 were selected for fecundity and fertility studies. The following crossings were carried out: treated females x treated males, treated females x untreated males, untreated females x treated males, untreated females x untreated males (control group). In both compounds it was observed a remarkable reduction in the production and eclosion of eggs, on comparing the first three crossings with the control group. As regards fecundity, sex influences were not observed, whereas fertility was more affected by treated females. No differences were found in connection with the survival of all types of crossings. Morphological affectations are reported in pupae and adults.