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Iranian Journal of Parasitology. 2011; 6 (1): 58-65
in English | IMEMR | ID: emr-103784

ABSTRACT

The aim of this study was to investigate the 'acaricidal effect' of Zataria multiflora and Artemisia annua essential oils on Rhipicephalus [Boophilus] annulatus. This study was carried out in 2009 in the Laboratory of Parasitology of the Faculty of Veterinary Medicine of Shahrekord University, west central Iran. Six dilutions [5, 10, 20, 40, 60 and 80 micro L/cm[3]] of both essential oils were used against engorged female R. [Boophilus] annulatus ticks using an in vitro immersion method. The mortality rates for each treatment were recorded 6, 15 and 24 hours post inoculation [hpi]. Mortality rate was analyzed using Repeated Measures Analysis of Variance, and comparison of means was carried out using General Linear Models Procedure. The mortality rate caused by different dilutions of Z. multiflora essential oil ranged from 26.6% [using 10 micro L/cm[3]] to 100% [using 40 micro L/cm[3]] and for A. annua essential oil it was 33.2 to 100% [using 20 and 80 micro L/cm[3], respectively] by the end of the experiment [36 hpi]. No mortality was recorded for the non-treated control group or for dilutions less than 5 and 10 micro L/cm[3] using Zataria and Artemisia essential oils, respectively. For Z. multiflora mortality peaked at 15 hpi for all concentrations other than 20 micro L/cm[3] and took 24 h to achieve its maximum effect while for A. annua the two highest concentrations needed 24 hpi to reach their full effect. In addition, essential oils applied at more than 20 and 60 micro L/cm[3] caused 100% egg-laying failure in engorged female ticks by Zataria and Artemisia, respectively while no failure was observed for the non-treated control group. The mortality rate in both botanical acaricides was dose-dependent. Both these medicinal plants have high potential acaricidal effects on the engorged stage of R. [Boophilus] annulatus in vitro


Subject(s)
Animals , Insecta , Acaricides , Artemisia annua , Oils, Volatile , Cattle , Rhipicephalus , Plants, Medicinal
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