| Abstrakt: |
Female black blow flies, Phormia regina (Meigen); secondary screw-worm flies, Cochliomyia macellaria (F.); and Cynomyopsis cadaverina (Robineau-Desvoidy) did not remate after mating with males sterilized by a dose of 7500 rad of gamma irradiation. Of the 3 species, P. regina lived and reproduced best in the laboratory; therefore, those blow flies were studied more intensively. When pupae of P. regina were treated, a dose of 2500 rad of gamma irradiation caused about 99% dominant lethality in sperm and greatly reduced fecundity and fertility of female flies. Pupae within 2 days of completing development tolerated 20,000 rad; pupae a day older survived 30,000 rad about as well as they withstood 5000 rad. Males sterilized with 7500 rad showed only a slight reduction in length of life and mating competitiveness. |
