Thymol

thymolbehandlung_20170128

In the 1990s, the Bee Research Centre took part in a screening programme testing the potential effectiveness of over 100 essential oils and essential oil components against the varroa mite. Although sage, hyssop and thyme oils proved interesting, only thymol has been used in acaricide products. Thymol treatments require little effort, and there are a variety of preparations on the market. The advantages and drawbacks of thymol use are listed in the articles "Apilife VAR: A new varroacide with thymol as the main ingredient" and "THYMOVAR for Varroa control".

Use of essential oils for the control of Varroa jacobsoni (Oud.) in honey bee colonies (PDF, 1 MB, 20.01.2017)
A. Imdorf, S. Bogdanov, R. Ibáñez Ochoa, N. W. Calderone (1999)

Publikationen Daniela Grossar

Jeker L., Grossar D., Straub L.
Unterschätzte Schadwirkung von Nematoden auf Bienen.
Beiheft Schweizerische Bienenzeitung, 4, 2024, 26-28.

Rüfenacht A., Straub L., Grossar D., Jeker L.
Underestimated adverse effects of entomopathogenic nematodes to honey bees.
In: AG-Bienentagung. 30. March, Potsdam. 2023, 1.

Rüfenacht A., Straub L., Grossar D., Jeker L.
Underestimated adverse effects of entomopathogenic nematodes on honey bees.
In: SETAC Europe Society of Environmental Toxicology and Chemistry. 30. April, Dublin. 2023, 1.

Jeker L., Kimmel S., Wenzel B., Straub L., Grossar D.
A novel approach for acute single dose toxicity testing on a solitary bee, Osmia bicornis.
In: 15th International Symposium of the ICP-PR Bee Protection Group. 18-21st October, York (UK). 2023, 12-16.

Grossar D.
Genetic diversity and effects of the bacterial pathogen Melissococcus plutonius in Swiss honey bee populations (Apis mellifera).
Hrsg. Université de Lausanne, Lausanne. 26 mai, 2023, 150 S.

Grossar D., Haynes E., Budge G. E., Parejo M., Gaultier L., Charrière J.-D., Chapuisat M., Dietemann V.
Population genetic diversity and dynamics of the honey bee brood pathogen Melissococcus plutonius in a region with high prevalence.
Journal of Invertebrate Pathology, 196, 2023, 1-8.

Charrière J.-D., Dietemann V., Kast C., Droz B., Dainat B., Grossar D., Jeker L.
Was lief im Jahr 2021 am Zentrum für Bienenforschung?
Schweizerische Bienen-Zeitung, 8, 2022, 20-27.
weitere Sprachen: französisch

Charrière J.-D., Dietemann V., Kast C., Droz B., Dainat B., Grossar D., Jeker L.
Was lief im Jahr 2021 im Zentrum für Bienenforschung?
Agroscope Transfer, 447, 2022, 1-15.
weitere Sprachen: französisch | italienisch

Christen V., Grossar D., Charrière J.-D., Eyer M., Jeker L.
Correlation Between Increased Homing Flight Duration and Altered Gene Expression in the Brain of Honey Bee Foragers After Acute Oral Exposure to Thiacloprid and Thiamethoxam.
Insect Science, 1, 2021, 1-15.

Charrière J.-D., Dietemann V., Kast C., Droz B., Dainat B., Grossar D., Jeker L.
Zentrum für Bienenforschung, Jahresbericht 2020.
Schweizerische Bienen-Zeitung, 144, (8), 2021, 16-23.
weitere Sprachen: französisch | italienisch

Korkaric M., Hanke I., Grossar D., Neuweiler R., Christ B., Wirth J., Hochstrasser M., Dubuis P.-H., Kuster T., Breitenmoser S., Egger B., Perren S., Schürch S., Aldrich A., Jeker L. und weitere
Datengrundlage und Kriterien für eine Einschränkung der PSM-Auswahl im ÖLN: Schutz der Oberflächengewässer, der Bienen und des Grundwassers (Metaboliten), sowie agronomische Folgen der Einschränkungen.
Agroscope Science, 106, 2020, 1-31.

Korkaric M., Hanke I., Grossar D., Neuweiler R., Christ B., Wirth J., Hochstrasser M., Dubuis P.-H., Kuster T., Breitenmoser S., Egger B., Perren S., Schürch S., Aldrich A., Jeker L. und weitere
Anhang I–V zur Publikation Agroscope Science Nr. 106.
Hrsg. Agroscope, September, 2020, 146 S.

Grossar D., Kilchenmann V., Forsgren E., Charrière J.-D., Gauthier L., Chapuisat M., Dietemann V.
Putative determinants of virulence in Melissococcus plutonius, the bacterial agent causing European foulbrood in honey bees.
Virulence, 11, (1), 2020, 554-567.

Jeker L., Grossar D.
Under review: data requirements and method development of a new bee risk assessment scheme for plant protection product registration.
Chimia, 74, (3), 2020, 176-182.

Eyer M., Grossar D., Jeker L.
Do pollen foragers represent a more homogenous test unit for the RFID homing test, when using group-feeding?
In: ICPPR 14th International Symposium. 23-25 october, Hrsg. ICPPR, Bern. 2019, 1.

Apilife VAR: A new varroacide with thymol as the main ingredient (PDF, 103 kB, 20.01.2017)
A. Imdorf, S. Bogdanov, V. Kilchenmann, C. Maquelin (1994)

"THYMOVAR" for Varroa control (PDF, 75 kB, 27.01.2017)
F. Bollhalder (1998)


Although the use of thymol leads to residues in the wax and honey, these are negligible from a toxicological viewpoint. Since about 2008 the use of thymol-based products has been declining in Switzerland, and beekeepers making use of these products have tended to experience greater winter losses than those using e.g. formic acid.

Thymol residues in wax and honey after Apilife VAR treatment (PDF, 757 kB, 14.09.2016)
S. Bogdanov, A. Imdorf, V. Kilchenmann (1998)