Abstract
This work has demonstrated that the life stages of the Hermetia illucens fly are characterized by varying melanin contents with the maximum melanin amount being detected in the pupa. It has been observed that active synthesis of the pigment takes place in the prepupa and coincides with the time when the population migrated for pupation. It has been noted that a high manganese content in the prepupa and pupa indicates the important role that this biogenic element plays in organogenesis and melanogenesis in H. illucens . It has been revealed that in the imago and pupa, the melanin demonstrates broad-range antimicrobial activity and contribute to the insect protection against bacterial and fungal infections.