[en] Two days-old eggs of the meal moth, Pyralis Farinalis L. Were exposed to different doses of gamma radiation ranged from 10 to 150 gray. Reduction in egg hatch was highly correlated with the given dose. At control, 83.2% of the eggs hatched and 75.6% of the eggs reached adult stage, whereas egg hatch was reduced to 21.8 , 16.1 and 5.8% after exposures to 100,120 and 150 gray, respectively. No adults emerged after egg irradiation to 150 gray. Gamma irradiation had almost slight effect on larval pupal duration without significant differences. Irradiation of eggs could alter the reproductive ability of the emerged moths. The doses 10, 20 and 40 gray delivered to the egg stage reduced egg production and fertility of the emerging moths. The greatest reduction was obtained when both sexes had been irradiated at 40 gray and paired together. Females were more radiosensitive than males. 2 tab