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首页> 外文期刊>中国昆虫科学：英文版 >Chemical constituents and fumigant toxicity of essential oil from Carum copticum against two stored product beetles
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Chemical constituents and fumigant toxicity of essential oil from Carum copticum against two stored product beetles

机译：黄连香精油对两种储藏甲虫的化学成分和熏蒸毒性

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摘要

Plant secondary metabolites play an important role in plant-insect interactions and therefore such compounds may have insecticidal or antifeedant activity against insects. Carum copticum C. B. Clarke (Apiaceae) is one of these plants that have medicinal effects on humans. The chemical composition of the essential oil from dry seeds of C. copticum was studied by gas chromatography (GC) and gas chromatography mass spectrometry (GC-MS). Thymol (41.34%), α-terpinolene (17.46%) and ρ-cymene (11.76%) were found to be the major constituents of the oil. In fumigant toxicity tests with the essential oil against adults of Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) at 27 +-1℃ and 60%+-5% RH, it was observed that S. oryzae (LC50= 0.91 μL/L) were significantly susceptible than T. castaneum (LC50= 33.14 μL/L). The mortalities of the insect species reached 100% at concentrations higher than 185.2 μL/L and 12-h exposure time. The findings indicate the strong insecticidal activity of C. copticum oil and its potential role as a fumigant for storedproduct insects.
机译：植物次生代谢产物在植物与昆虫的相互作用中起着重要作用，因此此类化合物可能具有杀虫或拒食昆虫的活性。 Carum copticum C. B. Clarke（Apiaceae）是对人类有药用作用的植物之一。通过气相色谱（GC）和气相色谱质谱（GC-MS）研究了黄连干燥种子的精油的化学成分。百里酚（41.34％），α-萜品油烯（17.46％）和对苯甲基异丙基苯（11.76％）被发现是该油的主要成分。在27 + -1℃和60％+-5％RH的条件下，用香精油对米果Sitophilus oryzae（L.）和蓖麻Tribolium castaneum（Herbst）的熏蒸剂毒性试验中，发现米曲霉（LC50 = 0.91μL / L）比锥栗（T. castaneum）明显易感（LC50 = 33.14μL/ L）。在高于185.2μL/ L的浓度和12小时的暴露时间下，昆虫的死亡率达到100％。这些发现表明，黄连油具有很强的杀虫活性，并具有作为储存产品昆虫的熏蒸剂的潜在作用。

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