Effect of Bacillus thuringiensis on the biological aspects of the great waxworm Galleria mellonella

The research was conducted to study the effect of Bacillus thuringiensis on Galleria mellonella(L.) at a concentration of 3 and 5%. The results of the study showed that 5% concentration gave the highest rates of killing for the three phases (first, third, and fifth) 88.88, 88.88, and 77.77%, respectively, compared with the control treatment that did not record any killing. The treatment also prolonged the larval life of the same concentration and for the stages mentioned above, where it recorded 24, 17 and 14 days, respectively, compared with the control treatment, which recorded 20, 15 and 11 days, respectively. The results also showed an effect on the percentage of adult emergence, where the concentration was recorded 5% for the phases (first, third, and five) 11, 11, 22 % respectively, compared to the percentage of emergence in the comparison treatment, which was recorded as 100%.The results also showed the presence of deformation in adults with a concentration of 5%, of which the wings are short and wrinkled and their appearance is distorted, as the percentage of deformation for the same stages mentioned above was 11, 11, 0 %, compared with the control treatment that did not record any deformations.&nbsp