Variation in the Antimicrobial Activity of Essential Oils from Cultivars of Lavandula angustifolia and L. × intermedia

The antimicrobial properties of essential oil from Lavandula sp. raise hopes related to its use in phytotherapy. This study aimed evaluate the activity oils cultivars L. angustifolia (‘Hidcote Blue Strain’, ‘Hidcote Blue’) and × intermedia (‘Phenomenal’, ‘Grosso’) grown central-eastern Poland, that is, at border northern lavender cultivation range. chemical composition was determined by GC/MS. Essential concentrations (20, 10, 5, 2.5, 1.25, 0.6, 0.3, 0.16, 0.08, 0.04 mg/mL) were tested determine minimum inhibitory concentration (MIC), bactericidal (MBC) or fungicidal (MFC) towards ten strains Gram-positive bacteria, five Gram-negative eight yeasts vitro culture. Lavendula showed against all microorganisms analysed. characterised higher sensitivity compared while bacteria more sensitive than bacteria. lowest MIC values for fungi obtained ‘Grosso’. Furthermore, ‘Grosso’ highest activity, found Blue’ Using Staphylococcus aureus as an example, it shown different bacterial same species show varying oil. A content noted intermedia, especially ‘Phenomenal’. Linalyl acetate linalool main components cultivars. However, oil, a high terpinen-4-ol (18.08%) also recorded. An analysis relationships between analysed suggested compounds potentially responsible activity. results allow us conclude with significant can be plants harvested part