Southwick studied and published on this. He took bees down to minus 80 C, and they survived -- if they had sufficient numbers and sufficient honey stores. I had a good talk with him about this about two weeks before he died, lost the battle with cancer.
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html