Pesticides, Bees and Wax.
January 2009 BEE CULTURE 33
An unhealthy, untidy mix
This past Spring our lab, along with Clemson University,
received a critical issues grant from the USDA
to study the sub-lethal effects of miticides on honey bee
colony health and performance, (bee population, brood
production, honey production, and colony foraging rates),
brood survivorship and adult longevity, and fi nally worker
learning and responsiveness to queen pheromone. It is
a two year study with our fi rst season’s data collection
The study consists of six treatments with eight colonies
per treatment for a total of 48 colonies. The treatments
are Apistan™, CheckMite+™, MavrikR, TakticR,
copper napthenate and a control (no chemicals). Treatments
were inserted in the spring and fall. The chemicals
used for the miticides are as follows: fl uvalinate (Apistan™
and MavrikR), coumaphos (CheckMite+™), and amitraz
(TakticR). All three chemicals control mites; however
MavrikR and TakticR are not labeled for use in honey bee
colonies but are used by beekeepers.
Re: Pesticides, Bees and Wax.
Documentation of Varroa resistance.
Detection of the high risk pyrethroid resistant Varroa destructor mites in apiaries of the Warmia-Mazury province in Poland.
Lipiński Z, Szubstarski J, Szubstarska D.
Specialistic Veterinary Diagnostic Laboratory Biolab, Grunwaldzka Str. 62, 14-100 Ostr6da, Poland Lipinski@sprint.com.pl
The aim of our current study was to investigate the possible occurence of pyrethroid (taufluvalinate) resistant Varroa mites infestations in 24 randomly chosen apiaries of Warmia-Mazury province of northeast Poland.
The methodology used for the analysis of resistant Varroa strains strictly followed the protocol described by Milani.
We identified 3 apiaries that were infested with high risk pyrethroid resistance mites and a further 9 apiaries that were free from this resitance. The brood samples collected from the remaining apiaries did not contain sufficient numbers of parasites to enable us to properly perform the assay.
Our finding that 25% of the tested brood samples showed a high risk of fully pyrethroid resistant Varroa mite contamination indicates that resistant Varroa may become wide spread in apiaries in Poland. Interestingly these high risk resistant mites were found in honeybee colonies with low levels of Varroa infestation, with an average rate of 2.16%. We also discuss the role of amitraz (amidine) in the phenomenon of Varroa resistance to pyrethroids.