Juvenile Hormone I Effects on the Camel Tick, Hyalomma dromedarii (Acari: Ixodidae)

摘要

Feeding and engorged nymphs and unfed and feeding adults of Hyalomma (H.) dromedarii were treated topically with 10, 20, and 50 micrograms juvenile hormone I (JH 1). Large doses of JH 1 were lethal to adults; nymphs tolerated JH 1, but emerging adults exhibited delayed mortality, which occurred after attachment to the host. The premolting period was prolonged by 9.4 to 31.0% in nymphs treated on repletion day but not in those treated at other times. JH 1 did not alter adult sexual behavior and caused only a small reduction in fertility of both sexes. The results suggest that H. dromedarii system did not respond to JH 1 because it may be very different from tick JH and/or the administration method was unsuitable.