Abstract
Effects of gamma irradiation doses between 5 and 100 krad on all stages of Tenebrio molitor L. and T. obscurus F. appeared to be similar although T. molitor was more radio-sensitive. Development of adults from eggs and larvae was prevented by 2.5 and 5 had, respectively, but some adult T. obscurus emerged from pupae treated with doses as high as 30 krad, and some T. molitor at doses of 50 krad. Adult females of both species were more sensitive than males to the sterilizing effects of gamma irradiation, but sterility was complete at doses of 15 krad and above. Control of these 2 species appears feasible with the levels of irradiation currently approved for treatment of stored-grain insects in wheat and wheat flour.
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