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)

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Publications Christina den Hond-Vaccaro

den Hond-Vaccaro C., Kay S., Herzog F.
Baumreihen im Gemüsebau: Silvoarabler Agroforst.
Agroscope. Merkblatt Nr. 218, 2024, 5 pp.
other Languages: french | italian

Roberti G., Bragazza L., Bretscher D., den Hond-Vaccaro C., Jarosch K., Keel S., Mariotte P., Merbold L., Reissig L., Walder F., Herzog F., Kay S.
Evaluation der Rolle von Agroforst in einer gesamtheitlichen Landwirtschafts- und Ernährungspolitik.
Agrarforschung Schweiz, 15, 2024, 199-206.
other Languages: french

den Hond-Vaccaro C., Jarosch K., Kay S., Herzog F.
How resilient are European agroforestry systems to climate change? What experts think.
In: EURAF 2024. 28-31 May, Publ. Mendel University in Brno, Brno. 2024, 68-69.

den Hond-Vaccaro C., Mascher F., Six J., Schöb C.
How does a winter wheat composite cross population perform in temperate agroforestry?: A Swiss case study.
In: EURAF 2024. 28-31 May, Publ. Mendel University, Brno (CZ). 2024, 203-204.

den Hond-Vaccaro C., Mascher F., Six J., Schöb C.
Performance of a winter wheat composite cross population in two temperate agroforestry systems: A Swiss case study.
Agroforestry Systems Online, 98, 2024, 1891-1904.

Vaccaro C., Six J., Schöb C.
How do different functional crop groups perform in temperate silvoarable agroforestry systems? A Swiss case study.
Journal of Sustainable Agriculture and Environment, 2, (2), 2023, 157-167.

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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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Publications Christina den Hond-Vaccaro