Abstract
Habrobracon females, when exposed to X-rays as larvae, pupae, or adults show a decrease in adult life span. Radiation damage to larvae and pupae, which cannot be detected simply by observing the incidence of adults that emerge, is revealed when adult life span is measured. Thus, adult life span should be used as an additional criterion of radiosensitivity when embryonic and post-embryonic stages of insect development are exposed to ionizing radiation.