COMBINED EFFECTS OF EGG AGE AND RADIATION DOSAGE ON EGG HATCH OF TENEBRIO MOLITOR (COLEOPTERA: TENEBRIONIDAE)

Abstract

Tenebrio molitor L. eggs in 15 age groups ranging from 0.5 to 7.5 days were irradiated with 10 dosages of gamma radiation ranging from 0.5 to 160 krad. The study showed that age had a pronounced effect on radiation-induced egg mortality. There was a 250-fold increase in resistance as eggs matured from 0.5 to 7.5 days as measured by the dosage required to produce an LD50.

Time-course mortality and radiosensitivity indices in gamma-irradiated Tribolium spp. (Coleoptera: Tenebrionidae)

“…The post-irradiation mean survival time of Tribolium spp. Similar results have been recorded by several workers (Tilton et al, 1966;Brower, 1972;Bughio, 1977;Younes and Ahmed, 1977). Tribolium destructor and T. anaphe were found to be the longestsurviving species.…”

SENSITIVITY OF ORYZAEPHILUS SURINAMENSIS (COLEOPTERA: CUCUJIDAE) TO CESIUM-137: I. IRRADIATION OF EGGS: THE EFFECTS ON HATCHING, SURVIVAL, AND FECUNDITY

“…These results are similar to those reported by Vereecke and Pelerents (1969) about sensitivity to gamma radiation of Tribolium confusum Duval eggs, but they found that 4to 6-day-old eggs were more resistant to radiation than the younger, 3-day-old eggs. Similarly, Brower (1972) showed that 5-day-old eggs of Tenebrio molitor L. had 4 times the resistance of 4-day-old eggs. The resistance rate, however, decreased after 5 days.…”