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Repellency of MyggA® Natural spray (para-menthane 3, 8-diol) and RB86 (neem oil) against the tick Ixodes ricinus (Acari: Ixodidae) in the field in east-central Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Zoology. (Medicinsk entomologi)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Zoology. (Medicinsk entomologi)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Zoology. (Medicinsk entomologi)
2006 (English)In: Experimental & applied acarology, ISSN 0168-8162, E-ISSN 1572-9702, Vol. 40, no 3-4, 271-277 p.Article in journal (Refereed) Published
Abstract [en]

In the field in south-central Sweden, we tested by randomised, standardised methodology the potential anti-tick repellent activity of two concentrations of MyggA® Natural spray (containing PMD) (4.2 and 3.2 g/m2) and one of RB86 (with 70% neem oil containing azadirachtin)(3 g/m2) to host seeking nymphs of Ixodes ricinus. Each substance was applied separately to 1 m2 cotton flannel cloths. Nymphal ticks on the cloths, pulled over the vegetation, were recorded at 10-m stops. Nymphal numbers recorded differed significantly between treated cloths [4.2 or 3.2 g MyggA® Natural spray/m2 and 3 g RB86/m2] and the untreated control (df = 3, χ2 = 112.74, P < 0.0001). Nymphal numbers also differed significantly among collectors (df = 3, χ2 = 15.80, P < 0.001). Repellency of treated cloths, i.e., 4.2 or 3.2 g MyggA® Natural spray/m2 and 3 g RB 86/m2 declined from day 0 (i.e. the day of impregnation) to day 3 after impregnation from 77 to 24%, 58 to 16% and 47 to 0.5%, respectively. This study suggests that all three treatments have significant repellent activities against I. ricinus nymphs.

Place, publisher, year, edition, pages
2006. Vol. 40, no 3-4, 271-277 p.
Keyword [en]
Azadirachtin, Ixodes ricinus ticks, Lemon eucalyptus, Para-menthane-3, 8-diol, Tick repellents
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-97765DOI: 10.1007/s10493-006-9031-4ISI: 000243963600010PubMedID: 17103083OAI: oai:DiVA.org:uu-97765DiVA: diva2:172826
Available from: 2008-11-12 Created: 2008-11-12 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Plant-Derived Chemicals as Tick Repellents
Open this publication in new window or tab >>Plant-Derived Chemicals as Tick Repellents
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Ixodes ricinus is the main vector of Lyme borreliosis and Tick-borne encephalitis in Europe. Repellents provide a practical means of protection against tick bites and can therefore reduce transmission of tick-borne diseases.

In laboratory tests, pieces of cloth treated with MyggA Natural® (a commercial insect repellent) or with the essential oils of Corymbia citriodora (30%), Lavandula angustifolia (1 and 30%), Pelargonium graveolens (1 and 30%), Hyptis suaveolens (10%), Salvadora persica, Pistacia atlantica, Juniperus phoenicea (20%) and methyl jasmonate (MJ) (0.5%, 1.0%, 2.0% and 5.0%) showed strong repellent activity against I. ricinus nymphs.

In a tick-infested woodland in east-central Sweden, we tested by randomized, standardised methodology the potential anti-tick repellent activity of MyggA Natural® (roll-on), two concentrations of MyggA Natural® spray, RB86 (a commercially available insect repellent for horses), the essential oil of C. citriodora and three concentrations of MJ. Each substance was dissolved in acetone and applied separately to 1 m2 cloths which were then pulled over vegetation. Nymphal tick numbers on the cloths were recorded at 10-m intervals and differed significantly between treated cloths and the untreated control and also between collectors.

Volatile compounds from fresh and dried leaves of H. suaveolens and the essential oils of H. suaveolens (from Laos and Guinea Bissau) and S. persica, P. atlantica and J. phoenicea (from Libya) were collected by solid phase micro-extraction (SPME) and the constituents were identified by gas chromatography - mass spectrometry (GC-MS). Two main sesquiterpene hydrocarbons in the H. suaveolens oil were β-caryophyllene and humulene. These were modified by oxidation and sulphidation to obtain effective tick repellent compounds with lower volatility. In all three oils from Libyan plants the main monoterpene hydrocarbons were α-pinene, sabinene, β-pinene, myrcene, α-phellandrene, 4-carene, β-phellandrene and γ-terpinene.

The selected plant species contained numerous volatiles known to have insecticidal, acaricidal, and/or insect repellent properties.

Place, publisher, year, edition, pages
Uppsala: Universitetsbiblioteket, 2008. 61 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 574
Keyword
Ixodes ricinus, plants, essential oils, tick repellent, Sweden
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-9368 (URN)978-91-554-7337-2 (ISBN)
Public defence
2008-12-05, Zootissalen, Evolutionsmuseet (Museum of evolution), Norbyvägen 16, SE-752 36, Uppsala, 09:00 (English)
Opponent
Supervisors
Available from: 2008-11-12 Created: 2008-11-12 Last updated: 2009-04-02Bibliographically approved

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