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为发现具有较高杀蚊活性的精油,推动植物精油类卫生杀虫剂的创制,本研究采用三角瓶熏蒸法测定了17科41种植物精油对淡色库蚊Culex pipiens pallens雌成蚊的熏蒸活性,并进一步采用密闭圆筒法验证其杀虫毒力大小。三角瓶熏蒸法测定表明,在12μL/L浓度下,留兰香油(spearmint oil)、薰衣草油(lavender oil)、山苍子油(Litsea cubeba oil)等26种精油均有较强的熏蒸作用,KT50小于15 min。该26种精油用密闭圆筒熏蒸法进一步测定表明,在浓度为10μL/L时,冬青油(wintergreen oil)、艾叶油(blumea oil)、薄荷油(peppermint oil)、桉叶油(Eucalyptus robusta oil)和蓝桉油(E.globulus oil)等植物精油熏蒸活性较强,其KT50分别为16.91,21.20,22.57,18.43和19.48 min。结果证明冬青油、艾叶油、薄荷油、桉叶油和蓝桉油等5种精油对淡色库蚊具有较强的熏蒸活性,具备作为淡色库蚊防控剂开发的潜力,值得进一步研究。
In order to find out the essential oil with higher anti-mosquito activity and promote the creation of plant essential oil health insecticides, the fumigation activity of 41 essential oils from 17 families of Culex pipiens pallens , And further use of closed cylinder method to verify the insecticidal virulence size. The results of flask fumigation showed that 26 kinds of essential oils such as spearmint oil, lavender oil and Litsea cubeba oil all had strong fumigation effect at the concentration of 12μL / L, KT50 is less than 15 min. The further determination of the 26 essential oils by closed cylinder fumigation showed that wintergreen oil, blumea oil, peppermint oil, Eucalyptus robusta oil ) And E.globulus oil were significantly stronger than those of other plant oils with KT50 of 16.91,21.20,22.57,18.43 and 19.48 min, respectively. The results showed that the five essential oils of wintergreen oil, aronia oil, peppermint oil, eucalyptus oil and eucalyptus oil had strong fumigation activity against Culex pipiens pallens, which had the potential to be developed as a control agent against Culex pipiens pallens. It deserved further study.