Re: Are SBB essential to treatment free beekeeping?
My SBB's are #6 mesh over oil pans that are enclosed within their own box. During winter I tape the back of the box where the pan slides out to shut off this source of draft.
Because of the larger mesh size, thru-out the rest of the year I find mites, SHBs, ants and a lot of other weird things floating in the oil (no bees). Whether they were DOA or drowned... I just feel that these are creatures that would otherwise, for the most part, just pick themselves up off a solid bottom board and make their way back up into the hive.
EAS Georgia Certified. "Tradition - Even if you have done it the same way for years doesn't mean that it is not stupid."