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Impact of gamma irradiation on the development and reproduction of Culex pipiens (Diptera; Culicidae)

Abstract Purpose: The aim was to evaluate the effects of irradiation of Culex pipiens irradiated as pupae on the larval and pupal mortality percentages, the larval and pupal duration, adult emergence percentages and ovarian development in comparison with the un-irradiated group. Material and methods: The mosquito, C. pipiens Linnaeus (L) was irradiated as pupae with three gamma doses 40, 60 and 80 Gy. Different biological aspects include the ovarian development of irradiated females tested. Results: Gamma doses used significantly increased the larval and pupal mortality percentages, the larval and pupal duration and significantly decreased the adult emergence percentages. Moreover, fecundity and egg hatchability percentages were severely decreased with increasing gamma doses. While the sterility% was positively correlated with the doses used. Gamma doses caused a dose-dependent decrease in the number of developed eggs, reduction in the number of developed oocytes, signs of degenerative processes in oocytes, yolk mass and egg size decrease. Conclusions: Results obtained indicated that gamma radiation of C. pipiens induced remarkable effects on the biological, developmental and reproductive activity.