Suddenly, I am having varroa problems where I did not before.

My varroa levels are ten times what they were over a month later last fall.

Maybe it is the warmer hives?  Otherwise everything I do is about the 
same as before.

Maybe the levels started higher in the spring this year?  Maybe it was 
the great bee season here?

I'm also wondering, though, if I picked up a more virulent strain of 
varroa recently.

If there are differing strains, that could explain why bees that seem 
varroa resistant in one region don't show resistance in another and why 
some people can get away without treating and others cannot.

Has anyone been doing genetic comparisons of varroa in various regions 
and outfits?

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