Coskun Sevki, Girisgin Oya, Kürkcüoglu Mine, Malyer Hulusi, Girisgin Ahmet Onur, Kirimer Nese, Baser Kemal Hüsnü
Department of Parasitology, Faculty of Veterinary Medicine, University of Uludag, Görükle, Bursa, 16059, Turkey.
Parasitol Res. 2008 Jul;103(2):259-61. doi: 10.1007/s00436-008-0956-x. Epub 2008 Apr 27.
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.
采用安捷伦气相色谱 - 质谱联用系统，对从土耳其西北部的牛至（Origanum onites L.）中通过水蒸气蒸馏法提取的香精油进行了分析。香芹酚是该油的主要成分（64.3%）。分别测试了浓度为1.5%、3.2%、6.25%、12.5%、25%、50%和100%（v/v）的纯商业香芹酚和香精油对饱血的图兰扇头蜱（Rhipicephalus turanicus）的作用，这些蜱是从该地区的养牛场采集的。暴露6小时后，纯香芹酚杀死了所有蜱虫，而25%及更高浓度的香精油在处理后24小时能完全有效地杀死蜱虫（p < 0.05）。6.25%和12.5%的浓度在第2天杀死了所有蜱虫。处理24小时后，测得半数致死浓度（LC50）和90%致死浓度（LC90）分别为2.34%和7.12%。这些发现表明，牛至（Origanum onites L.）的香精油有潜力以合理浓度用于控制蜱虫侵扰。
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