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Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting.

Abstract

Plant essential oils (EOs) have been considered as spatial repellents to help disrupt the pathogen transmission cycle of mosquitoes. Our objective was to assess spatial repellency effects of EOs on the tropical yellow fever mosquito, Aedes aegypti (L.) (Diptera: Culicidae) and on local mosquito populations in coastal British Columbia (Canada). In laboratory experiments using protocols of the World Health Organization, three of the solitary EOs tested proved repellent to Ae. aegypti: cinnamon bark, lemongrass, and rosemary. Binary combinations of select EOs enhanced the repellent effect of single EOs through synergistic interactions. The EO blend of geranium and peppermint lowered the RD50 (the dose required to obtain 50% repellency) of each solitary EO by >1,000-fold. Compared with binary EO blends, ternary EO blends were typically less repellent to mosquitoes, possibly due to a dilution effect of the most effective EO constituent(s) in the blend. In field experiments, the EO blend of lemongrass and cinnamon bark expressed spatial repellency towards the cool weather mosquito, Culiseta incidens (Thomson) (Diptera: Culicidae), even when this blend was disseminated from devices as much as 1 m away from a sentinel trap releasing attractive vertebrate host odorants and CO2. Deployment of EOs as spatial repellents in small outdoor gatherings could help protect humans from mosquito-borne diseases, particularly when this tactic is coupled with other tools of mosquito management.

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  • Authors+Show Affiliations

    ,

    Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia , Canada.

    ,

    Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia , Canada.

    ,

    Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia , Canada.

    Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia , Canada.

    Source

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    31143941

    Citation

    Peach, Daniel A H., et al. "Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting." Journal of Medical Entomology, 2019.
    Peach DAH, Almond M, Gries R, et al. Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting. J Med Entomol. 2019.
    Peach, D. A. H., Almond, M., Gries, R., & Gries, G. (2019). Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting. Journal of Medical Entomology, doi:10.1093/jme/tjz078.
    Peach DAH, et al. Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting. J Med Entomol. 2019 May 30; PubMed PMID: 31143941.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Lemongrass and Cinnamon Bark: Plant Essential Oil Blend as a Spatial Repellent for Mosquitoes in a Field Setting. AU - Peach,Daniel A H, AU - Almond,Max, AU - Gries,Regine, AU - Gries,Gerhard, Y1 - 2019/05/30/ PY - 2019/01/13/received PY - 2019/5/31/entrez KW - mosquito KW - plant essential oils KW - spatial repellent KW - synergism JF - Journal of medical entomology JO - J. Med. Entomol. N2 - Plant essential oils (EOs) have been considered as spatial repellents to help disrupt the pathogen transmission cycle of mosquitoes. Our objective was to assess spatial repellency effects of EOs on the tropical yellow fever mosquito, Aedes aegypti (L.) (Diptera: Culicidae) and on local mosquito populations in coastal British Columbia (Canada). In laboratory experiments using protocols of the World Health Organization, three of the solitary EOs tested proved repellent to Ae. aegypti: cinnamon bark, lemongrass, and rosemary. Binary combinations of select EOs enhanced the repellent effect of single EOs through synergistic interactions. The EO blend of geranium and peppermint lowered the RD50 (the dose required to obtain 50% repellency) of each solitary EO by >1,000-fold. Compared with binary EO blends, ternary EO blends were typically less repellent to mosquitoes, possibly due to a dilution effect of the most effective EO constituent(s) in the blend. In field experiments, the EO blend of lemongrass and cinnamon bark expressed spatial repellency towards the cool weather mosquito, Culiseta incidens (Thomson) (Diptera: Culicidae), even when this blend was disseminated from devices as much as 1 m away from a sentinel trap releasing attractive vertebrate host odorants and CO2. Deployment of EOs as spatial repellents in small outdoor gatherings could help protect humans from mosquito-borne diseases, particularly when this tactic is coupled with other tools of mosquito management. SN - 1938-2928 UR - https://www.unboundmedicine.com/medline/citation/31143941/Lemongrass_and_Cinnamon_Bark:_Plant_Essential_Oil_Blend_as_a_Spatial_Repellent_for_Mosquitoes_in_a_Field_Setting L2 - https://academic.oup.com/jme/article-lookup/doi/10.1093/jme/tjz078 DB - PRIME DP - Unbound Medicine ER -