Abstract
Essential oil extracted from aerial parts of Artemisia nilagirica was analysed by gas chromatography–mass spectroscopy. Forty-three constituents amounting to 98.16% of the total essential oil contents were identified. The essential oil contained approximately 79.91% monoterpenoids and 18.25% sesquiterpenoids. α-Thujone (36.35%), β-thujone (9.37%), germacrene D (6.32%), 4-terpineol (6.31%), β-caryophyllene (5.43%), camphene (5.47%) and borneol (4.12%) were identified as the major constituents. The essential oil exhibited significant antifungal activity against Rhizoctonia solani (ED50, 85.75 mg L−1), Sclerotium rolfsii (ED50, 87.63 mg L−1) and Macrophomina phaseolina (ED50, 93.23 mg L−1). This study indicated that A. nilagirica essential oil can be used to control phytopathogenic fungi infesting agricultural crops and commodities.
Acknowledgements
The authors are thankful to UGC New Delhi, India [grant no. F.4-3/2006(BSR)/11-84/2008(BSR)], for providing financial assistance.