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Mediterranean Fruit Flies: Sterility and Sexual Competitiveness in the Laboratory After Treatment with Gamma Irradiation in Air, Carbon Dioxide, Helium, Nitrogen or Partial Vacuum

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Abstract:

The level of sterility of males of Ceratitis capita (Wiedemann) was similar when a given dose of gamma irradiation was applied to pupae in atmospheres of nitrogen, carbon dioxide or helium or in a partial vacuum. A dose of 10 krad in air was sufficient to produce 99.5% sterility in males; a dose of 16 had was required to obtain this same level of sterility when treatment was done in nitrogen, carbon dioxide, helium or partial vacuum. Males treated in each of the modified atmospheres were significantly more competitive than males treated in air; however, flies treated in nitrogen or helium were most competitive. When pupae treated in air, partial vacuum or nitrogen were packed in polyethylene bags and held for 20 h at 24°C to simulate shipping conditions, competitive values for males were 0.22, 0.56, and 0.71, respectively.

Document Type: Research Article

Publication date: April 1, 1977

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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