>
> >I think we're all guessing....at best..... but I think it may be
> misleading to make such an oversimplified comparison.


Of course we are.  But it's a fair guess that if tracheal mite didn't exist
in North America until around 1980, that it was not widespread in Europe
prior to 1920, or it would likely have been inadvertently imported.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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