Simple regression analyses of 20 species of insects representing the orders Anoplura, Coleoptera, Diptera, Hemiptera, Hymenoptera, Orthoptera, and Thysanura indicated that the total body concentration of several major and trace elements could be used as bioindicators or biopredictors of acute (<tex-math>${\rm LD}_{50(24\ {\rm hr})}$</tex-math>) radiosensitivity for a species population when insects were subdivided into groups based on laboratory diets. The groups were divided into cockroaches, blood feeders, and stored product beetles based on their broad dietary. Statistical models based on insect total body potassium, magnesium, and copper (i.e., copper/iron ratio) for the 3 groups, respectively, were found to be effective in predicting or estimating acute radiation mortality for related insect species having similar feeding preferences.

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