>Personally, I think screened bottom boards were a bad idea in the first place and see no good come from them.
Can't agree.
When I first tried fully open-mesh floors (open feed holes but no other top ventilation) with half my colonies I had 9% losses with OMF and 19% with wooden floors.
I have moved to 6 frame poly nucs and have not lost any yet. They have fully open mesh floors and no upper entrance.
Best wishes
Peter
52°14'44.44"N, 1°50'35"W
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