A few months back there was a poster from Florida who had one apiary on a sunny concrete pad, and several others that were not. He reported a MUCH lower SHB infestation in the hives on concrete.
It sounds reasonable. The larvae have to burrow to develop to adults, and they have to cross a lot of open concrete in his bee yard to do so. They are exposed to drying out and to predators like ants.
It sounds reasonable. The larvae have to burrow to develop to adults, and they have to cross a lot of open concrete in his bee yard to do so. They are exposed to drying out and to predators like ants.