Re: QC broken down after emerging?
They are not normally that quick, in fact emerged cells can stay there for weeks.
More likely there was a problem with the cell and the bees have cleaned it up, but not possible to say for certain. Best next step would be to test the nuc by putting a frame of eggs in it, to see if they build cells, that will tell you if they are queenless or not.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).