Journal
JOURNAL OF ESSENTIAL OIL BEARING PLANTS
Volume 23, Issue 2, Pages 405-413Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/0972060X.2020.1756425
Keywords
Amomum rubidum; essential oil; monoterpenes; larvicidal activity
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This work reports the chemical constituents and larvicidal activity of essential oil from Amomum rubidum Lamxay & N. S. Ly. The essential oil was extracted from the air-dried rhizome in an all-glass Clevenger-type apparatus and characterized by gas chromatography (GC-FID) and gas chromatography/mass spectrometry (GC/MS) on HP-5 column. The larvicidal property was evaluated against the fourth-instar larvae of Aedes aegypti according to the protocols of the World Health Organization. A. rubidum essential oil was characterized by high amounts of beta-phellandrene (16.1 %), limonene (14.4 %), and delta-3-carene (13.9 %). The oil displayed larvicidal activity against Ae. aegypti with minimum lethal concentration, LC50 values of 22.85 and 22.62 mu g/mL respectively at 24 h and 48 h, while the LC50 values of 31.44 mu g/mL and 31.03 mu g/mL were obtained respectively at 24 h and 48 h. The chemical constituents and larvicidal actions of A. rubidum rhizome essential oils are being reported for the first time.
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