>
>
> >A varroa resistant bee may produce smaller, more efficient colonies but
> less honey and might not overwinter well in a cold climate. A very
> productive bee may produce large colonies, lots of honey, but be plagued by
> rapid varroa buildup.


In my selection of colonies that maintain extremely low mite levels, I've
not noticed that they were necessarily less strong, productive, or gentle.
This lack of trade offs surprises me, as I wouldn't have been surprised to
see some.
-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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