Thymol

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)

Soil microbial communities are sensitive to differences in fertilization intensity in organic and conventional farming systems.

Institutional Repository Agroscope

Lori M., Hartmann M., Kundel D., Mayer J., Mueller R. C., Mäder P., Krause H.-M.

Soil microbial communities are sensitive to differences in fertilization intensity in organic and conventional farming systems.

FEMS Microbiology Ecology, 99, (6), 2023, 1-13.

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ISSN Print: 0168-6496
ISSN Online: 1574-6941
Digital Object Identifier (DOI): https://doi.org/10.1093/femsec/fiad046
Publikations-ID (Webcode): 53125 Per E-Mail versenden

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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)

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Thymol

Soil microbial communities are sensitive to differences in fertilization intensity in organic and conventional farming systems.