>
>  If so, how is the brood affected by the OAV treatments. I
> know that the mites in the brood are not killed with OAV, but is the brood
> harmed?


Catherine, take a look at the Extended Release update at my website--at the
end I discuss the apparent (and surprising) lack of adverse effects of
vaporization during summer upon the brood.

My point to Bill was not about whether OA vaporization can be effective,
but rather that the timing and number of applications that work in Maine,
will assuredly not be adequate in areas such as yours in California, in
which colonies have brood year round.

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

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