A couple of years ago I had a swarm that I had overwintered. I wasn't too keen on it so I split it to make nucs and put my own queens in. As soon as they were queenless, laying workers developed in each of the nucs - pretty well before any of the open brood was sealed. Maybe you have a few bees with a strong desire to lay eggs?NigelP wrote: ↑15 Jun 2020, 14:55Then a mystery..... A Snelgrove Method 2, queen is in top box...I know because I saw her. Brood boxes separated by 4 supers. No queen in bottom box, just an added framed of sealed brood. Yet on one of the frames there is a patch of drone comb and inside every one of them is a single egg. How did that happen?
Boxes have been separated for 7 days now, not enough time for laying workers to develop and it was just a single egg in each.....
May your bees read the same books as you do.