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In very dry conditions, especially in the late winter/early spring, as you
describe, or in indoor flight arenas, we see some problems with bees
maintaining brood.  Much of the European literature on flight chambers
suggests that difficulties in keeping bee colonies strong and viable for
long periods while confined indoors may be due to extremes of humidity,
with overly dry conditions just as bad as overly wet.

Jerry

>So, what are the typical problems for bees being held in low R.H.
>conditions over extended periods or during in winter housing?

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