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Parasitol Res. 2008 Jul;103(2):259-61. doi: 10.1007/s00436-008-0956-x. Epub 2008 Apr 27.

Acaricidal efficacy of Origanum onites L. essential oil against Rhipicephalus turanicus (Ixodidae).

Author information

1
Department of Parasitology, Faculty of Veterinary Medicine, University of Uludag, Görükle, Bursa, 16059, Turkey. scoskun@uludag.edu.tr

Abstract

Essential oils that were extracted by steam distillation from Origanum onites L. from northwest Turkey were analyzed using an Agilent GC-MSD system. Carvacrol was the major component (64.3%) of the oil. Both pure commercial carvacrol and essential oil at concentrations of 1.5%, 3.2%, 6.25%, 12.5%, 25%, 50%, and 100% (v/v) were tested for their effects against engorging Rhipicephalus turanicus, which were collected from cattle breeding in the region. Pure carvacrol killed all the ticks following 6 h of exposure, while 25% and higher concentrations of the oil were completely effective in killing the ticks by the 24th-hour post-treatment (p < 0.05). The concentrations of 6.25% and 12.5% killed all the ticks by day 2. Lethal concentrations for 50% (LC(50)) and 90% (LC(90)) of 2.34% and 7.12%, respectively, were detected 24 h post-treatment. These findings indicate that the essential oil of O. onites L. has potential to be utilized at reasonable concentrations to control tick infestations.

PMID:
18438729
DOI:
10.1007/s00436-008-0956-x
[Indexed for MEDLINE]

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