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Acaricidal properties of ylang-ylang oil and star anise oil against nymphs of Ixodes ricinus (Acari: Ixodidae)
Uppsala Univ, Evolutionary Biol Ctr, Dept Systemat Biol, Norbyvagen 18d, SE-75236 Uppsala, Sweden..ORCID iD: 0000-0001-9341-2052
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry.
Uppsala Univ, Dept Environm Toxicol, Evolutionary Biol Ctr, Uppsala, Sweden..
Swedish Univ Agr Sci SLU, Dept Biomed Sci & Vet Publ Hlth, Uppsala, Sweden..
2018 (English)In: Experimental & applied acarology, ISSN 0168-8162, E-ISSN 1572-9702, Vol. 76, no 2, p. 209-220Article in journal (Refereed) Published
Abstract [en]

Ylang-ylang oil (YYO) from Cananga odorata (Lam.) Hook.f. & Thomson and star anise oil (SAO) from Illicium verum Hook.f. were tested at four concentrations 0.05, 0.1, 0.2, 0.4 mu l/cm(2). Mortality rates were obtained by counting dead nymphs at 30-min intervals during the first 5h after the start of exposure and then at 24, 48 and 72h. Mortality increased with increasing oil concentration and time of exposure. The two highest concentrations of YYO (0.2, 0.4 mu l/cm(2)) gave maximum lethal concentrations (LC) of 50 and 95% mortality after 4.5h exposure. Mortality of 95% was obtained after 24h with the next highest dose (0.1 mu l/cm(2)), whereas LC95 required 3days with the lowest YYO (0.05 mu l/cm(2)). The lethal effect time (LT) was correlated with the duration of exposure, with a significant effect at 0.4l YYO/cm(2) after 3h' (LT50=3.2h, LT95=4.3h). In contrast, only the highest concentration of SAO, 0.4 mu l SAO/cm(2), showed increasing mortality with time of exposure. This reached LT50 after 10h and LT95 after 24h. However, with the lower concentration (0.2 mu l/cm(2)) 50% mortality was reached after 24h and 100% at 72h. At to the lowest concentration of SAO (0.1 mu l/cm(2)), 67% mortality after 48h. The study indicates that YYO and SAO exhibit strong acaricidal properties against nymphs of I. ricinus and suggest that both YYO and SAO should be evaluated as potentially useful in the control of ticks.

Place, publisher, year, edition, pages
SPRINGER , 2018. Vol. 76, no 2, p. 209-220
Keywords [en]
Acaricide, Cananga odorata, Illicium verum, Ixodes ricinus
National Category
Zoology
Identifiers
URN: urn:nbn:se:kth:diva-238137DOI: 10.1007/s10493-018-0299-yISI: 000446985800005PubMedID: 30302625Scopus ID: 2-s2.0-85054701357OAI: oai:DiVA.org:kth-238137DiVA, id: diva2:1261726
Funder
Swedish Research Council FormasSida - Swedish International Development Cooperation Agency
Note

QC 20181108

Available from: 2018-11-08 Created: 2018-11-08 Last updated: 2018-11-08Bibliographically approved

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