The present work investigated the effect of gamma irradiation of different developmental stages of the cowpea weevil Callosobruchus maculatus on the fertility of adults in order to determine the sterilizing dose for each stage. The effects of various doses of gamma rays on the DNA and protein patterns of the irradiated adults were also studied to find a physiological marker serving as an effective biological indicator of sterility or sterility genotype print. Alterations of the DNA and protein patterns of the sterile males and females of C. maculatus from the normal ones provide an...