Changes in the integument of nymphal and adult hyalomma [hyalomma] dromedarii koch[Acari: Ixodoidea: Ixodidae] II the effect of 20-hydroxy ecdysone

The exogenous doze of 20-Hydroxy Ecdysone [20-HE] used in the present study did not accelerate moulting in nymphal Hyalomma dromedarii. However, histological observations exhibit an increase in epidermal cell activity and in the deposition of the endocuticular lamellae