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EFFECT OF GAMMA RADIATION ON THE PUPAL RADIOSENSITIVITY AND MALE STERILITY OF THE PEACH FRUIT FLY, BACTROCERA ZONATA (SAUNDERS) (DIPTERA: TEPHRITIDAE) (Pages : 14 - 18)
M.A. HOSSAIN, S.A. KHAN AND A.J. HOWLADERAn experiment was conducted to know the effect of gamma radiation on the pupal radiosensitivity and male sterility of the peach fruit fly. Radiosensitivity of pupae was found to be decreased as the age increased. No adults were emerged from 1, 2, 3, 4, 5 and 6 day old pupae treated with 40, 150, 200, 300, 350 and 400 Gy doses accordingly. The LD50 values for 1, 2, 3, 4, 5 and 6 day old pupae were 23.98, 31.18, 38.73, 96.93, 112.07 and 123.55 Gy respectively. It revealed that late aged pupae are comparatively radioresistant than that of early aged pupae. Gamma ray significantly (p<0.01) increased the pupal duration and decreased the longevity of the peach fruit fly. The sterilizing dose of 60 Gy was recorded for 6 days old pupae of B. zonata.Download