The Effect of Certain Gases on the Radiosensitivity of Habrobracon during Development

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Abstract
Habrobracon during postembryonic development were exposed to X-rays in the presence of air, N, CO2, and H. The effects on development to adulthood were observed. Organisms irradiated in the presence of N were about 3 times as resistant as those irradiated in air at the 3 stages of development tested. Habrobracon during the larva-in-cocoon stage were more radio-resistant when irradiated in the presence of H than in the presence of air. Further, groups irradiated in N or in CO2 were more resistant to radiation damage than those treated in H. Thus, the radiosensitivity was modified by the presence of H. The data are taken to indicate that there is no clear relation between O2 poisoning and X-radiation damage in Habrobracon.