My Brother from Idaho asked me to post this. He has been trying to graft queens since spring with no luck at all. So he tried OTS notching with 5 new nucs on Sunday. He looked at them today and only one hive has a single capped queen cell. (not where he notched) All of the young brood in the other four hives is gone. The young brood was also gone in the grafting hives. Andy ideas on what is wrong. He thinks maybe it is due to small population of bees as he did not move the nucs to another apiary.