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 Alexandra Roetschi

Marien A., Fumière O., Roetschi A., Maljean J., Berben G.
A validated real-time PCR test for simultaneous detection of Gallus gallus and Meleagris gallopavo in feed instead of an impossible poultry test.
Biotechnologie, Agronomie, Société et Environnement: BASE, 28, (1), 2024, 1-16.

Roetschi A., Gschwend F., Arias E.
Leuconostoc spp. in the rind of soft smear cheese: A contribution to food safety.
In: 14th International Symposium on Lactic Acid Bacteria. 29 August, Hrsg. Royal Netherlands Society for Microbiology, Egmond aan Zee (NL). 2023, 1.

Fuchsmann P., Von Ah U., Guisolan A., Roetschi A., Christ B.
Bacteria inoculation on sheep wool to improve vegetative growth, yield, taste and aroma in soilless strawberry production.
In: 13th Wartburg Symposium on Flavor Chemistry & Biology. 3 - 6 October, Eisenach. 2023, 1.

Wenger A., Schmidt R., Portmann R., Roetschi A., Eugster E., Weisskopf L., Irmler S.
Aat is a novel aminotransferase present in Pediococcus acidilactici capable to produce alpha-aminobutyrate.
In: 13th International Symposium on Lactic Acid Bacteria. 23.8., Hrsg. FEMS, online. 2021, 1.

Wenger A., Schmidt R., Portmann R., Roetschi A., Eugster E., Weisskopf L., Irmler S.
Identification of a species-specific aminotransferase in Pediococcus acidilactici capable of forming α-aminobutyrate.
AMB Express, 10, 2020, 1-9.

Lüdin P., Roetschi A., Wüthrich D., Bruggmann R., Berthoud-dit-Gallon Marchand H., Shani N.
Update on tetracycline susceptibility of pediococcus acidilactici based on strains isolated from swiss cheese and whey.
Journal of Food Protection, 81, (10), 2018, 1582-1589.

Wenzel C., Irmler S., Bisig W., Guggisberg D., Roetschi A., Portmann R., Wechsler D., Fröhlich-Wyder M. T.
The effect of starters with a functional arginine deiminase pathway on cheese ripening and quality.
International Dairy Journal, 85, (October), 2018, 191-200.

Kast C., Roetschi A.
Evaluation of baker’s yeast in honey using a real-time PCR assay.
Food Microbiology, 62, 2017, 282-288.

Kast C., Kilchenmann V., Roetschi A.
Was bedeuten Backhefen im Honig?
Schweizerische Bienen-Zeitung, 03, 2017, 16-17.
weitere Sprachen: französisch

Lüdin P., Von Ah U., Rollier D., Roetschi A., Eugster-Meier E.
Lactic acid bacteria as markers for the authentication of Swiss cheeses.
Chimia, 70, (5), 2016, 349-353.

Haldemann J., Berthoud-dit-Gallon Marchand H., Roetschi A., Von Ah U., Rollier D., Eugster E.
Tête de moine AOP: une nouvelle culture pour certifier son origine.
Recherche Agronomique Suisse, 4, (10), 2013, 448-450.

Irmler S., Houstek D., Bavanantharajah T., Oberli A., Roetschi A., Guggenbühl B., Berthoud-dit-Gallon Marchand H.
Properties of alanine dehydrogenase from pediococcus acidilactici FAM18098.
In: The 5th Congress of European. July 21-25, Hrsg. FEMS, Leipzig, Germnay. 2013, 1.

Charrière J. D., Roetschi A.
Survival of Melissococcus plutonius, the causative agent of European foulbrood, on wood and in honey.
In: Früjkajrstagimg 2013. 19. März, Hrsg. Schweizerische Vereinigung für Tierproduktion, Posieux. 2013, 2-2.

Irmler S., Bavan T., Oberli A., Roetschi A., Badertscher R., Guggenbühl B., Berthoud H.
Catabolism of Serine by Pediococcus acidilactici and Pediococcus pentosaceus.
Applied and Environmental Microbiology, 79, (4), 2013, 1309-1315.

Roetschi A., Isolini D., Eugster-Meier E.
Rohmischkulturen sind sehr vielfältig.
Alimenta, (08), 2010, 24-25.

Roetschi, A., Berthoud, H., Kuhn, R., Imdorf, A.
Infection rate based on quantitative real-time PCR of Melissococcus plutonius, the causal agent of European foulbrood, in honeybee colonies before and after apiary sanitation.
Apidologie, 39, 2008, 362-371.

Charrière, J.- D., Roetschi, A.
Sauerbrut - eine heimtückische Brutkrankheit.
ALP forum, (57), 2008, 1-30.
weitere Sprachen: französisch

Imdorf, A., Roetschi, A., Kuhn, R.
Rapida diffusione della peste europea75313.
l'Ape, 90, (09.10.2009), 2007, 9-14.

Imdorf, A., Roetschi, A., Kuhn, R.
Rapide propagation de la loque européenne en Suisse75217.
Revue Suisse d'apiculture, 128, (10), 2007, 28-34.

Imdorf, A., Roetschi, A., Kuhn, R.
Rasante Ausbreitung der Sauerbrut75009.
Schweizerische Bienen-Zeitung, 130, (9), 2007, 6-9.

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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)