1972 年 7 巻 3 号 p. 103-108
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.