Radiation-induced sterility in Ephestia cautella (Walker) (Lepidoptera: Pyralidae): Recovery of fertility during five generations after gamma irradiation

Gamma radiation sensitivity of the eggs, larvae and pupae of Indian meal moth Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae)

“…To obtain the maximum effect, the substerilizing dose selected for use with the P 1 should be sufficient to cause a high degree of sterility in the resulting F 1 progeny, otherwise the target population could start to recover rapidly in spite of the depressing effect of inbreeding exerted for several generations 38. If the F 1 progeny are not completely sterile, it is very important to ascertain the degree of fertility of males and females in the F 1 generation, since a small number of fertile moths, under favourable conditions, are sufficient to initiate a new population 39. If population elimination is the goal, then control depends on releasing substerilized males that produce essentially sterile F 1 progeny, or on releasing sterile P 1 males 38.…”

Effect of UV radiation on the uzi-fly, Exorista sorbillans Wiedemann, an endoparasitoid of the silkworm, Bombyx mori L.

“…The oviposition period of E. sorbillans was significantly (P < 0.001) shortened as the period of irradiation was increased in all the crosses as compared to the control batch (Fig. Progeny unaffected by such mutations have normal reproductive rates whereas genes and chromosome mutations are transmitted to progeny that die or that have reduced fertility, resulting in their rapid elimination (Amoako-Atta et al, 1978). However, the cross between irradiated male and untreated female showed a longer oviposition period in all the exposure times compared to some crosses (Fig.…”

INHERITANCE OF PARTIAL STERILITY IN PROGENY OF IRRADIATED MALES OF EPHESTIA CAUTELLA (LEPIDOPTERA: PYRALIDAE) AND ITS EFFECT ON THEORETICAL POPULATION SUPPRESSION

“…Populations were eliminated in as few as 3 or 4 generations when full sexual competitiveness was assumed. Recently a good study was published though only two doses were used (Amoako-Atta et al 1978). Although I showed that mating competitiveness of 50-kradtreated moths was only reduced slightly in the laboratory (Brower 1979b), the high sterilizing doses are more likely to reduce male sexual competitiveness under field conditions.…”

“…Although I showed that mating competitiveness of 50-kradtreated moths was only reduced slightly in the laboratory (Brower 1979b), the high sterilizing doses are more likely to reduce male sexual competitiveness under field conditions. Recently a good study was published though only two doses were used (Amoako-Atta et al 1978). A better understanding of some of the advantages of partially sterile male release gained from studies of other species of moths (North…”