Efficacy of flumethrin and coumaphos against the camel tick Hyalomma dromedarial L. [Acari: ixodidae]

The efficacy of Flumethrin pour on and Coumaphos 50% WP was tested against different stages of Hyalomma dromedarii. With contact method, LC[50] values for larvae and adults were 0.04, 0.03 ug/cm[2] and 0.05, 1.06 ug/cm[2] respectively. The LC[50] for coumaphos against the larvae, adults and eggs using dipping method were 44, 63, and 62 ppm respectively. Flumethrin caused significant reduction in oviposition and hatchability in female ticks that survived sublethal concentrations, while sublethal doses of coumaphos had no effect on the reproductive potential of the tick. The results showed that flumethrin was 8 times more toxic than coumaphos