Composition of the essential oil from the root of Artemisia annua
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Upon hydrodistillation, dried roots of Artemisia annua L. cultivar Jwarharti gave a pleasantly fragrant essential oil with a yield of 0.25%. GC and GC–MS analyses of the oil enabled the identification of 52 components representing 83.2% of the oil. The oil was rich in sesquiterpenes and oxygenated sesquiterpenes and had cis-arteannuic alcohol (25.9%), (E)-β-farnesene (6.7%), β-maaliene (6.3%), β-caryophyllene (5.5%), caryophyllene oxide (4.4%) and 2-phenylbenzaldehyde (3.5%) as its major components. The oil was found to possess considerable fumigant activity and ability to repel adult Tribolium castaneum beetles.
KeywordsArtemisia annua Asteraceae Root essential oil Sesquiterpenes Cis-arteannuic alcohol Anti-insect activity Tribolium castaneum
Grateful thanks are due to the Directors of the Central Institute of Medicinal and Aromatic Plants, Lucknow and the Institute of Himalayan Bioresource Technology, Palampur for extending to us the use of their analytical facilities, and the NIPGR for other facilities.
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