Hello Beekeepers,
 
It is now accepted that there is Varroa resistance to pyrethroids in
Italy and France,  maybe elsewhere.
 
When this subject is raised it is often said that this phenomenon
is due to beekeepers either using approved chemicals in a
non-approved fashion or using non-approved chemicals such as Mavrik.
 
Of course I accept that this may be the case,  but I would like to
hear the evidence that these factors have caused resistance.
 
Joe Hemmens