The present investigation was undertaken to study the
effectiveness of Olea europaea leaves extract and gamma
irradiation against the greater wax moth, Galleria mellonella larvae.
Acetone Olea europaea leaves extract was prepared at (2, 1, 0.5,
0.25and 0.125%) to be examined for their efficacy against the 4th
instar larvae. The effects of 5 different doses of gamma irradiation
(50, 100, 150, 200 and 250 GY) was also assayed on the biology of
greater wax moth, G. mellonella. Results revealed that larval
mortality of G. mellonella reached (8.2%) and (57.3%) after1&10
days from treatment, with the lowest concentration of 0.125%.
While, the highest concentration 2 % caused (31.0%) and (100 %)
larval mortality after1&10 days post-treatment for plant extract. All
doses of gamma irradiation prolonged the larval period and reduced
both pupation and percentage of adult emergence. The number of
eggs laid was decreased by increasing the irradiation doses at all
treatments. The insects failed to lay any eggs especially, in the
treatments (treated male × treated female) and (normal male ×
treated female) with doses 200 and 250 GY, respectively.