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Date: | Sun, 4 Dec 2022 15:32:22 -0500 |
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> I would think they really tax colonies in really cold winters
We studied screened bottom boards for several years when I worked at the Dyce Lab at Cornell. We left them on year round. The hives were on stands, about 4" above the ground so air would circulate freely except when buried in snow, for example.
We evaluated the hives for every metric: honey production, brood area, survival. We could never see any difference between solid bottoms vs screened bottoms. I came to the conclusion they don't make any difference.
see: Calderone, N. W. (2007). A three-year study of screened bottom boards in the northeast. Am. Bee J, 147, 436-437.
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