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Effects of gamma-irradiation on survival and fertility of Glossina palpalis palpalis

Published online by Cambridge University Press:  19 September 2011

S. O. Tenabe ,
A. N. Mohammed  and
Y. O. Aliu
S. O. Tenabe
Affiliation:
Entomology Section, Nigerian Institute for Trypanosomiasis Research, Vom
A. N. Mohammed
Affiliation:
University of Calabar, P.M.B. 1115, Calabar, Cross River State
Y. O. Aliu
Affiliation:
Department of Physiology and Pharmacology, Ahmadu Bello University, Zaria, Nigeria
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Abstract

The effects of various exposure to irradiation from cesium 137 in nitrogen and air on survival and fecundity of Glossina palpalis palpalis were compared. With doses from 3 to 21 krad in nitrogen atmosphere, male fertility was inversely correlated with dose, above 15 krad male survival was inversely correlated with dose. All males subjected to either 21 krad in nitrogen or 15 krad in air were sterilized. Females appeared to be more sensitive to gamma-irradiation than males; a dose of 6 krad in nitrogen resulted in 100% sterility and arrested further development of the ovaries after the ovulation of follicles A1 and C1. In males, this dose caused 70.3% sterility. Approximately 97 and 98% sterility were obtained when males were treated with 15 krad in nitrogen and 12 krad in air respectively. No fly emerged from irradiated puparia younger than 15 days. Irradiation of 15 or 20 days old puparia killed the insect either before or shortly after eclosion, whereas the normal patterns of emergence, survival and reproduction were observed from puparia that were irradiated when 25 days old or older.

Résumé

Les effets de l'irradiation du cesium 137 dans l'azote et l'air sur la survivance et la fécondité de Glossina palpalis palpalis étaient comparés. Avec des doses de 3 à 21 krad dans une atmospherè d'azote, la fertilité des mâles étaient en correlation inversé avec la dose, au dessus de 15 krad la survivance des mâles était en correlation inverse avec la dose. Tous les mâles soumis à 21 krad dans l'azote ou 15 krad dans l'air étaient sterilisés. Les femmelles semblaient être plus sensibles à l'irradiation aux rayons gamma que les mâles; une dose de 6 krad dans l'azote causait une stérilité de 100% et arretait un développement plus avancé des ovaires après l'ovulation des follicules A et C). Chez les mâles, cette dose à cause 70, 3% de stérilité. Approximativement 97 et 98% de stérilité étaient obtenus quand les mâles étaient traités avec 15 krad dans l'azote et 12 krad dans l'air respectivement.

Aucune mouche n'a émergé des chrysalides irradiés âgés de moins de 15 jours. L'irradiation de chrysalides âgés de 15 ou 20 jours a tué l'insecte soit avant ou peu après l'éclosion, alors que les modèles normaux d'emergence, survivance et de reproduction étaient observes chez les chrysalides qui étaient viradies quand ils avaient 25 jours ou plus.

Keywords

Irradiated Glossina palpalis palpalissurvivalfertilityGlossina palpalis palpalis irradiésurvivancefertilité
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 7 , Issue 2 , April 1986 , pp. 149 - 153
Copyright
Copyright © ICIPE 1986

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