Notes on the Effect of Preconditioning Confused Flour Beetles with Temperature Variations or Carbon Dioxide Prior to Gamma Irradiation

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Modifications of the radiosensitivity of various species of insects have been demonstrated when the insects were exposed to sublethal heating or to various gases. Baldwin and Narraway (1958) reported that the lethal effects of X-rays were drastically modified by temperatures which are normally nonlethal to the test species, Dahlbominus fuscipennis (Zetterstedt) (50°F–114°F), the effect being observed when the temperatures were applied during or after the irradiation, but not when they were applied before the X-ray. Clark and Herr (1955) found that Habrobracon during development was more radioresistant when irradiated in the presence of H2 than in the presence of air. When irradiated in N2 or CO2 the insects were more resistant to radiation damage than those treated in an atmosphere of H2. The effects of preconditioning with variations of temperature or carbon dioxide anesthesia on the susceptibility of confused Hour beetles, Tribolium conjusum Jacquelin duVal, to gamma irradiation was not known. A preliminary test to determine the effects of such preconditioning on the radiation mortality of this species was conducted.

Document Type: Research Article

Publication date: February 1, 1965

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