Thymovar varroa control with natural substances
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THYMOVAR ® Varroa control with natural substances. www.biovet.ch. October 2007. Contents. Thymol and THYMOVAR ® Varroacide Use of THYMOVAR ® Comparative trials Practical trial Incidence on brood, residues Pest management strategy. Thymol and THYMOVAR ® Varroacide Use of THYMOVAR ®

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Thymovar varroa control with natural substances l.jpg

THYMOVAR®

Varroa control with natural substances

www.biovet.ch

October 2007


Contents l.jpg
Contents

  • Thymol and THYMOVAR®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Slide3 l.jpg

  • Thymol and THYMOVAR®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Thymovar l.jpg
THYMOVAR®

  • Carrier material : sponge strips of viscose

  • Impregnated with 15 g Thymol PH EUR

    • Slow evaporation of Thymol

  • Veterinary medicament

  • Swiss quality


Registration l.jpg
Registration

  • Bosnia-Herzegovina

  • New Zealand

  • Germany

  • France

  • Belgium

  • Algeria

  • Turkey

  • South Korea

  • Netherland

  • Israel

  • Cyprus

  • Austria

  • Switzerland

2007

2006

2006

2006

2006

2004

2004

2003

2002

2002

2000

1999

1998


Active substance thymol l.jpg
Active Substance : Thymol

  • Nature identical substance

  • Naturally contained in thyme essential oil

  • Property : evaporates at room temperature

  • Natural component of a few honeys

  • Accepted for biological control according to EU-regulation no. 1804/1999


Thymol in honey l.jpg
Thymol in honey

(Guyot et al. 1998)

7


Thymol in food l.jpg

In the EU, food legally contains up to 50 mg Thymol/kg, with no maximum value for Thymol residues in foodstuff of animal origin

In Switzerland, the legal threshold for Thymol residues in honey is 0.8 mg/kg

Thymol in food?


Thymol in everyday life l.jpg
Thymol in everyday life no maximum value for Thymol residues in foodstuff of animal origin

  • Uses by Humans

    • Refreshing substances

    • Dental hygiene

    • Aromas (beverage, food) 50 mg/kg

  • Features

    • Antibacterial

    • Antifungal

    • Disinfectant

    • Varroacide

9


Slide10 l.jpg

  • Thymol and THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Varroacide l.jpg
Varroacide no maximum value for Thymol residues in foodstuff of animal origin

Toxicity in laboratory :

Varroa

% Mortality

Bee

Therapeutic window

Thymol µg/l air

(Imdorf et al. 1995)


Concentration of thymol l.jpg
Concentration of Thymol no maximum value for Thymol residues in foodstuff of animal origin

Threshold of enhanced bee mortality

Thymol during treatment with THYMOVAR®

µg Thymol/l air

Threshold of enhanced Varroa mortality

Time after THYMOVAR®application (days)

(internal assays in one colony 1998)


Slide13 l.jpg

  • Thymol and THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Use of thymovar l.jpg
Use of THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • 2 Applications per year :

    • 2 x 3 weeks

    • in late summer

  • Temperatures

    • 15-30 °C

    • 20-25 °C ideal


Propolization l.jpg
Propolization no maximum value for Thymol residues in foodstuff of animal origin

THYMOVAR® bee-hive strips may be damaged and propolized by bees. However, according to our observations, THYMOVAR®doesn’t lose its effectiveness against the mites.


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Placement of Strips no maximum value for Thymol residues in foodstuff of animal origin

One storey hive

Two storey hive

Dadant


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  • Thymol and THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Field trials switzerland l.jpg
Field trials Switzerland no maximum value for Thymol residues in foodstuff of animal origin

Efficacy

Place 217 coloniestreatment 4 weeks

Place 314 coloniestreatment 7 weeks

Place 410 coloniestreatment 7 weeks

Place 14 coloniestreatment 7 weeks

(Internal report 1997)


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Field trials no maximum value for Thymol residues in foodstuff of animal origin Germany

20


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Field trials Italy no maximum value for Thymol residues in foodstuff of animal origin

>90%


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  • Thymol and THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Incidence on brood l.jpg
Incidence on brood no maximum value for Thymol residues in foodstuff of animal origin

No significant influence on brood surface

open

Brood surface (cm2)

sealed

(Pechhacker 2003)

THYMOVAR®

THYMOVAR®

Formic acid

Formic acid

Control

Control

Before treatment

After treatment


Residues in honey l.jpg
Residues in honey no maximum value for Thymol residues in foodstuff of animal origin

Honey shows no alteration when THYMOVAR® is correctly used!

mg Thymol/kg honey

Highest detected dose

(internal assays)

Legal threshold Switzerland

Taste detection threshold


Residues in honey24 l.jpg
Residues in honey no maximum value for Thymol residues in foodstuff of animal origin

Thymol residues in honey in field trials with Thymol-based products :

No further treatment

Years :

mg Thymol/kg honey

(Bogdanov 1998)


Residues in wax l.jpg
Residues in wax no maximum value for Thymol residues in foodstuff of animal origin

Evaporation of Thymol under different conditions :

  • Foundations, stacked in a closed cardbox box

  • Mounted foundations in a comb cupboard (unaerated)

  • Mounted foundations in a comb cupboard (aerated)

  • Foundations, drawn out in a colony

mg Thymol/kg wax

Number of days

(Bogdanov 1998)


Slide26 l.jpg

  • Thymol and THYMOVAR no maximum value for Thymol residues in foodstuff of animal origin®

  • Varroacide

  • Use of THYMOVAR®

  • Comparative trials

  • Practical trial

  • Incidence on brood, residues

  • Pest management strategy


Pest management strategy l.jpg
Pest management strategy no maximum value for Thymol residues in foodstuff of animal origin

Control of the infestation rate of the mites

Late summer treatment at the right moment

Winter treatment as soon as the colony is broodless (about 3 weeks after the first frost)

30


Pest management model l.jpg

More than 50 Varroa no maximum value for Thymol residues in foodstuff of animal originper colony in December

1st THYMOVAR®

Less than 50 Varroa per colony in December

2nd THYMOVAR®

Development of Varroa with a controlstrategy

Oxalic acid

Pest management model

2500

Healthy winter bees

2000

Varroa per colony

1000

500

50

J

F

M

A

M

J

J

A

S

O

N

D

Month


Pest management model29 l.jpg
Pest management model no maximum value for Thymol residues in foodstuff of animal origin

Control of natural mite fall (drone brood cutting)

Late summer treatment

Winter treatment

32


Summary l.jpg
Summary no maximum value for Thymol residues in foodstuff of animal origin

  • Thymol : the ideal solution for Varroa control in late summer

  • THYMOVAR®

    • Natural

    • Simple

    • Effective

    • Harmless for bees

  • Production of quality honey

  • Integration in control strategy

33


Literature l.jpg
Literature no maximum value for Thymol residues in foodstuff of animal origin

  • Baggio A., Piro, Roberto et al. (1999, publicated 2002), Prodotti a base di timolo per il controlo della varroasi , l’APE, Heft 4, S. 30-33

  • Berg S. (2004), LLH Bieneninstitut Kirchhain, Erlenstrasse 9, 35274 Kirchhain

  • Bruneau E. (2007), THYMOVAR® as us. Vet., Rapport d’essai, CARI, Louvain-la Neuve, Belgique

  • Guyot C., Bousseta A., Scheirman V., Collin S. (1998), Floral origin markers of chestnut and lime tree honeys, J. Agric. Food. Chem. 46, 625-633

  • Goodwin R. M., Taylor M. A. , Mcbrydie H. M. and Cox H. M. (20006), Drift of Varroa destructor-infested worker honey bees to neighbouring colonies, Journal of apiculture research 45 (3) :155-156

  • Bogdanov S., Imdorf A., Kilchenmann V. (1998), Residues in wax and honey after API LIFE VAR treatment, Apidologie 29, 513-524, Paris, http://www.alp.admin.ch/themen/00502/00503/00513/index.html?lang=en (02.02.2007)

  • Imdorf A., Bogdanov S., Ochoa R. I., Calderone N. C. (1995), Use of essential oils for the control of Varroa jacobsoni Oud. in honey bee colonies, Apidologie 26, 27-31

  • Marinelli E. (1999,2000), Report on investigations with THYMOVAR®, Istituto sperimentale per la zoologis agraria – Sezione di apicoltura, Roma

  • Otten C. (2004), DLR Fachzentrum für Bienen und Imkerei, Im Bannen 38-54, 56727 Mayen

  • Pechhacker M. (2003), Versuchsbericht zur Anwendung von THYMOVAR® zur Varroabekämpfung, A-3293 Lunz am See


Thanks for your attention l.jpg

Thanks for your attention! no maximum value for Thymol residues in foodstuff of animal origin


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