Gamma Radiation Effects on Testes and on Mating Success of the Indian Meal Moth, Plodia interpunctella1, 3

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Abstract
Fifth-stage male larvae and 1-day-old male adults of the Indian meal moth, Plodia intcrpunctella (Hübner), were treated with gamma radiation. Histological observations on the testes and spermatogenic material were made, and the mating success of paired irradiated males and nonirradiated females was determined. In larval tests, spermatogonia were found to be most sensitive to radiation, followed by spermatocytes, and then spermatids. Damage to all stages increased with increasing radiation dose. Larvae treated with 3.5 krad developed normally, and mating behavior and sperm transfer to females were normal. Previous work has showed that genetic damage, as evidenced by decreased progeny production, was transmitted through several generations. When adult males were treated with 25 krad, sperms appeared unaffected but progeny production in the 1st generation was reduced. However, this effect did not carry over into 2nd and 3rd generations.

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