Free access
Issue
Apidologie
Volume 33, Number 4, July-August 2002
Page(s) 357 - 366
DOI http://dx.doi.org/10.1051/apido:2002027


Apidologie 33 (2002) 357-366
DOI: 10.1051/apido:2002027

First report of Varroa destructor resistance to pyrethroids in the UK

Helen M. Thompson, Michael A. Brown, Richard F. Ball and Medwin H. Bew

National Bee Unit, Central Science Laboratory, Sand Hutton, York, YO41 1LZ, UK

(Received 8 November 2001; revised 2 January 2002; accepted 14 January 2002)

Abstract
Varroa destructor resistance to pyrethroids has been reported in mainland Europe since the early 1990's. V. destructor was first detected in the UK in 1992 and since then there has been widespread use of the only two authorised pyrethroid treatments. A routine national screening programme for resistance to pyrethroids was established in 2000 and in August 2001 resistance was detected in southwest England. The resistance outbreak was limited to 25 apiaries, was associated with product misuse, and the resistance factors to fluvalinate and flumethrin were approximately 10 fold when compared to susceptible mites. There was no cross-resistance with amitraz, coumaphos or cymiazole. This level of resistance is far lower than that detected following widespread colony collapse in Italy and highlights the importance of the correct use of varroacides and of early detection of resistance to enable its control.


Key words: Varroa destructor / resistance / pyrethroid / monitoring

Correspondence and reprints: Helen M. Thompson
    e-mail: H.Thompson@csl.gov.uk

© INRA, EDP Sciences, DIB, AGIB 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.