Author： ASHRAF MOHAMMAD OHINATA KIICHI HARRIS ERNEST J.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.69, Iss.4, 1976-07, pp. : 574-576
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Abstract
Five-day-old ♂ melon flies, Dacus cucurbitae Coquillett, treated by gamma irradiation in ambient atmosphere were ca. 99.8% sterilized by a dose of 15 krad. The dose required to sterilize S-day-old females was between 12 and 15 krad. Males treated with a dose of 15 krad did not recover fertility, but males treated with lower doses (from 4–12 krad) did lose sterility. The sexual competitiveness of melon fly males irradiated with 15 krad as 5-day-old adults was ca. ½ that of males sterilized as 2-day-old adults with 8 krad or as pupae 2 days before eclosion with 6 krad. Thus, in a melon fly sterile-release program, no advantage is gained by irradiating flies in the adult stage.
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