Abstract
SUMMARYBy shielding abdominal segments III–V, queen honeybees were enabled to survive otherwise lethal doses of radiation; in contrast, irradiating only segments III–V with 10 000 r. killed all queens within three weeks, as did whole-body irradiations. Lead shields are described that protect part of the abdomen and permit irradiation of either the spermatozoa in the spermatheca or the oogonia of the ovary, with higher doses that could otherwise be administered without killing the queen.
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