The different aged female uzi flies pupae of 6, 7 and 8 day old were selected and irradiated at 1, 1.5 and 2kr gamma irradiation. The fecundity (No.), fertility (No.) and hatching percentage (%) was recorded in female flies which emerged out of irradiated pupae. The female uzi flies that emerged from 6, 7 and 8 day old irradiated pupae at 1.0 Kr mated with normal male uzi flies showed fertility of 66.66, 68.33 and 467.00. Whereas, the female flies that emerged out 7 and 8 day old irradiated pupae at 1.5 Kr showed fertility of 20.00 and 110.00. However, the female flies that emerged out of 8 day old irradiated pupae at 2.0 Kr showed 165.33 fertility. The hatching percentage of 13.54, 13.81 and 94.71was recorded in the female flies which emerged from the 6, 7 and 8 day old irradiated pupae at 1kr. The percent of hatching was 5.00 and 82.70 in the eggs laid by the female flies which emerged from 7 and 8 day old irradiated pupae at 1.5 kr. The hatching percentage of 88.34 was observed at 2kr radiation in female flies that emerged from 8 day old irradiated pupae.

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