Abstract
The effects of ionizing radiation doses between 1 and 20 krad on all stages of Rhyzopertha dominica were studied. Adult emergence from treated eggs and larvae was prevented by 4 and 8 krad respectively. Doses up to 20 krad to pupae only slightly reduced the emergence of adults. However there was considerable (up to 30 per cent) mortality of the adults within 8 hours of eclosion. The 20 krad dose caused very high mortality of adults from irradiated pupae and of irradiated adults within 3–5 weeks. Complete sterility, as evidenced by the lack of an F 1 generation, was induced in pupae by a dose of 14 krad and in adults by 11·5 krad.
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