Age as a Factor in Determining Radiosensitivity of Eggs of Plodia interpunctella1

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Abstract
Age had a profound effect on the interaction of irradiation dose and egg hatch when eggs of Plodia interpunctella (Hübner) were treated with 0.5–50 krad. Radiosensitivity varied as development proceeded from 1 to 72 h, and there was a 25-fold difference between the most sensitive (2 h) and the most resistant age (72 h) as measured by the dose required to reduce egg hatch to 50%. Eggs 18, 24, and 30 h old were equally sensitive, and 24-h eggs were selected as the easiest age at which to irradiate with a low dose for induction of sterility in the resulting adults.

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