The Effect of Gamma Irradiation on Fertility and Mating Competitiveness of the Mosquito, Culex pipens molestus F. (Diptera : Culicida)

抄録

To know the effects on emergence, longevity, fertility and mating competitiveness, 2-day-old male pupae of Culex pipiens molestus were irradiated with various dosages of ⁶⁰Co gamma rays ranging from 1, 000 to 12, 000 R. Few effects of the gamma irradiation on both emergence and longevity were noticed. However, high levels of egg-mortality could be produced in males by exposing pupae to irradiation. Exposure to 10, 000 R produced 99.1% egg-mortality and a dose of 12, 000 R gave a 99.9% egg-mortality. Competitiveness test showed that mating activity of radiosterilie males was lower than that of the normal males.