"Bayvarol is too expensive and do not know why it didn't worked for me
(talking of 7 years ago)"

Hi Juanse here, in Spain, Bayvarol doesn´t work, and I´m talking about
trial we made , not beeks observations (Goverment tested it before buy
and recomend it). I always had thought about fluvlinate
cross-resistance because spanish beekeepers have been on home-made
treatment for many years (since varroa arrived in 1985) using an
agriculture pesticide named "Klartan" (tau-fluvalinate);

 ...Apistan (Fluvalinate), obsviously, doesn´t work now

P.David Quesada
Honey Bee Pathology Lab
Extremadura, Spain

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