Study of the biological peculiarities of Fransaiella colchica in the larvae, nymphs and imago of Boophilus calcaratus in Azerbaijan

As a result of the research, the morphological features and development of Francaiella colchica in larvae, nymphs, and imago of Boophilus calcaratus were studied. The development of the parasite in larvae and nymphs was not found. In the internal organs of imago (salivary glands, ovaries, intestines), various forms of the parasite (cigar-shaped, pear-shaped, oval) were found. The development of the parasite was noted mainly in the salivary glands and, in a small amount, in the ovaries.