Abstract This work reports the chemical constituents and larvicidal activity of essential oil from Amomum rubidum Lamxay & N. S. Lý. 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 β-phellandrene (16.1 %), limonene (14.4 %), and δ-3-carene (13.9 %). The oil displayed larvicidal activity against Ae. aegypti with minimum lethal concentration, LC50 values of 22.85 and 22.62 μg/mL respectively at 24 h and 48 h, while the LC50 values of 31.44 μg/mL and 31.03 μg/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.

中文翻译：

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越南红宝石根茎精油的化学成分及杀幼虫活性

摘要 这项工作报告了来自 Amomum rubidum Lamxay & NS Lý 精油的化学成分和杀幼虫活性。在全玻璃 Clevenger 型装置中从风干的根茎中提取精油，并在 HP-5 柱上通过气相色谱 (GC-FID) 和气相色谱/质谱 (GC/MS) 进行表征。根据世界卫生组织的协议，对埃及伊蚊四龄幼虫的杀幼虫特性进行了评估。A. 铷精油的特点是含有大量的 β-水芹烯 (16.1%)、柠檬烯 (14.4%) 和 δ-3-carene (13.9%)。该油显示出对 Ae 的杀幼虫活性。aegypti 具有最小致死浓度，24 小时和 48 小时的 LC50 值分别为 22.85 和 22.62 μg/mL，而 LC50 值分别为 31.44 μg/mL 和 31。分别在 24 小时和 48 小时获得 03 μg/mL。首次报道了铷根茎精油的化学成分和杀幼虫作用。