Degree Type

Dissertation

Date of Award

1987

Degree Name

Doctor of Philosophy

Department

Entomology

First Advisor

John A. Mutchmor

Abstract

Six day old face fly pupae, one day before emergence, were irradiated in a nitrogenous atmosphere using gamma radiation from a cobalt 60 source. Six levels of gamma radiation were used: 0, 500, 1000, 1500, 2000 and 2500 rads. The effects of gamma radiation on eclosion, reproduction, and male longevity and competitiveness were determined. Female mating habits under laboratory conditions were also examined;Irradiation under anoxic conditions did not adversely affect adult eclosion, female fecundity or male competitiveness. Sterility in treated males and females increased as radiation dosage increased. A dose of 2500 rads reduced fertility of males to less than 1% and produced similar results in the females. Longevity of treated males was not affected by increasing radiation dose up to 2000 rads. However, males receiving 2500 rads died sooner than unirradiated males. Studies on the mating habit of the female face fly showed that most of the females mated only once; however, few of them mated a second time;The results of this study indicate that face fly males treated as six-day old pupae with 2500 rads in a nitrogenous atmosphere would apparently be satisfactory for use in a sterile male release program.

DOI

https://doi.org/10.31274/rtd-180813-9342

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Mohammed Youssef Mansour

Language

en

Proquest ID

AAI8825474

File Format

application/pdf

File Size

86 pages

Included in

Entomology Commons

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