Antifungal activity of the essential oils of Rosmarinus officinalis, Salvia officinalis, Lavandula dentata and Cymbopogon citratus against the mycelial growth of Fusarium oxysporum f.sp.Albedinis

The present study concerns the antifungal activity of essential oils (EO) of four aromatic plants: Salvia officinalis, Rosmarinus officinalis, Cymbopogon citratus and Lavandula dentate. It was carried out on the mycelial growth of Fusarium oxysporum f.sp.Albedinis. The essential oils were extracted from the aerial parts of the plants by the hydrodistillation method. The test was carried out using the method of direct contact with the fungus at different concentrations of essential oils (0.25%, 1% and 2.5%).The results show that the essential oils of lavender and lemon grass exert a strong antifungal activity on the fungus at a concentration of 2.5 g/l for the essential oil of lavender and at a concentration of 1g/l for the essential oil of lemon grass. On the other hand, the two essential oils of sage and rosemary proved to have a lesser impact on the tested strain. The minimum inhibitory concentrations (MIC) were observed in the four essential oils including, MIC(Rosmary)= 0.2 g/l, MIC(Sage)= 2.5 g/l, MIC(Lavender)= 0.6 g/ l and MIC(Lemon grass)= 0.5g/l. The minimum lethal concentrations (MLC) were observed only in lavender essential oil, with MLC(Lavander)= 1.75g/l and in lemongrass essential oil, with MLC(Lemon grass)= 0.95 g/l .