Abstract
One-day-old house flies, Musca domestica L. (Diptera: Muscidae), were sexually sterilized by topical application of 50 micrograms of tepa. On the day following sterilization, 7 flight characteristics of male flies were compared with those of nontreated males of the same age, using an automatically recording flight mill. An effect upon flight was noted but was not significant. Oxygen consumption of tepa-sterilized and nonsterilized flies of both sexes was determined by a Gilson circular Warburg. A significant (P<0.05) reduction in oxygen consumption by tepasterilized males occurred. Tepa-sterilization had no significant effect upon oxygen consumption in females. Neither sex showed any difference in weight within the 1st day following treatment.

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