“…The mean essential oil concentration for all treatments was 1.03% although the best results were recorded in the Symbivit treatment (1.23%) (Table 2). Similarly, in the literature, the oil content of sage oscillated around 1.5% (De Mastro et al, 2006;Menghini et al, 2013) caused by different environmental conditions and harvest times. Earlier research on S. officinalis by Nell et al, (2009) showed neither AM inoculation using Symbivit, G. mosseae and G. intraradices or P application significantly changed the EO yields, although other Lamiaceae species, Mentha arvensis (Freitas et al, 2004), Ocimum basilicum (Copetta et al, 2006;Zolfaghari et al, 2013) and different Origanum species (Khaosaad et al, 2006;Tarraf et al, 2015), demonstrated consistent results regarding the increased oil quantity in favour of inoculation using AMF.…”