Abstract
The aerial parts of Ruta montana were collected from two different locations in Algeria (Berrouaghia and HamamMelouane). A hydrodistillation was conducted and the resulting volatile oil was analyzed by Gas chromatography coupled with Mass Spectrometry (GC/MS). The results showed that the best yield in essential oil was obtained in full bloom (0.98%) from the region of Berrouaghia which was higher than the yield of the ecotype gathered in Hammam Melouane (0.82 %). The main predominant component of R.montana collected from Berroughia and HamamMelouane is 2-Undecanone (C11H22O); (59.34%) and (49.39%) respectively. The insecticidal test by in vitro contact assay showed a significant mortality of Sitophilus oryzae traited by R. Montana essential oil (EO). The results of this study showed that the toxicity of the R. montana oil vary with increasing concentration of applied doses on one hand, and a relatively gradual efficiency versus time, which results in improved efficiency on the other hand.
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