I would ask a couple off questions and give it some more thought.
1. was there a surplus of royal jelly in the failed cells?
2. What did the brood paterns look like from the queen that was used to
generte the cells?
I might suspect bee parlasys. I have seen such with worker larve that
hve been under nourishrd.
Alden Marshall
B-Line Apiaries
Hudson, NH 03051
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