>
>
> >At my location, 47N, most queens reduce laying in early Sept. and are
> pretty well done by early Oct. We have a fairly good and consistent pollen
> flow the entire time and while temps are definitely cooling most days have
> good flight conditions.


It's surprising to me that your queens shut down when there's a pollen flow
on and decent flight weather.
In Australia, Trevor showed me colonies in full brood production on the
winter solstice, which really makes me question the photoperiod hypothesis.
And in my apiary when I tested Russian bees, they'd brood up as though it
was April when we got a little pollen flow in cool November.

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

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