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首页> 外文期刊>Journal of Medical Entomology >Insecticidal activity of individual and mixed monoterpenoids of geranium essential oil against Pediculus humanus capitis (Phthiraptera: Pediculidae).
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Insecticidal activity of individual and mixed monoterpenoids of geranium essential oil against Pediculus humanus capitis (Phthiraptera: Pediculidae).

机译：天竺葵精油中单个和混合的单萜类化合物对人脚小Pe的杀虫活性（Phthiraptera：Pediculidae）。

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摘要

The major components of geranium (Geranium maculatum L.) oil and their mixtures were tested against female Pediculus humanus capitis De Geer (Phthiraptera: Pediculidae). Chemical analysis by gas chromatography coupled to mass spectrometry revealed four major constituents: citronellol (38%), geraniol (16%), citronellyl formate (10.4%), and linalool (6.45%) (concentration expressed as percentage of total). Topical application demonstrated that the most potent component was citronellol and geraniol, with LD50 values 9.7 and 12.7 micro g/insect, respectively. Linalool and Citronellyl formate were less toxic with LD50 values 24.7 and 38.5 micro g/insect, respectively. Toxicity of these four major constituents in the same proportion as the natural oil, was greater than whole oil and each individual component. Removal of any four constituents produced a decreased in effectiveness. The absence of citronellol caused the greatest decrease in toxicity (DL50 from 2.2 to 10.9 micro g/insect), leading us to conclude that this constituent is the major contributor to oil toxicity. The knowledge of the role of each constituent in the toxicity of the whole oil gives the possibility to create artificial blends of different constituents for the development of more effective control agents.
机译：测试了天竺葵（天竺葵> L。）油和其混合物的主要成分对雌性 Pediculus humanus capitis De Geer（Phthiraptera：Pediculidae）的作用。气相色谱与质谱联用的化学分析显示了四个主要成分：香茅酚（38％），香叶醇（16％），香茅酸甲酸酯（10.4％）和芳樟醇（6.45％）（浓度表示为总百分比）。局部应用表明，最有效的成分是香茅醇和香叶醇，LD 50 的值分别为9.7和12.7微克/昆虫。芳樟醇和甲酸香茅酯的毒性较低，LD 50 值分别为24.7和38.5 micro g /昆虫。这四种主要成分的毒性与天然油的比例相同，大于全油和各个成分。去除任何四个成分都会导致有效性降低。香茅醇的缺乏导致毒性的最大降低（DL 50 从2.2微克/昆虫减少至10.9微克/昆虫），使我们得出结论，该成分是造成油中毒的主要因素。知道每种成分在全油的毒性中的作用后，就有可能创建不同成分的人工混合物，以开发更有效的控制剂。

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