Abstract
This paper reports the effect of high temperatures on the reproductive compatibility of geographic strains of flour beetles, Tribolium confusum. Some geographic strains are reproductively incompatible with other strains owing to a maternally inherited microorganism: Males infected with the microorganism are reproductively incompatible with uninfected females. All other crosses are fertile. Previous reports indicated that infected strains can be cured of the microorganism by culturing the beetles on medium containing tetracycline and that cured males become reproductively compatible. This study reports that raising larvae at high temperatures (37°C) promotes curing. The proportion of individuals cured is a function of sex and the period of exposure to high temperature.
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