I origianlly saw the show on TLC (The Learning Channel). The point about African queens emerging one day earlier has to do with swarm and supercedure cells. The African queen emerges and then kills her sisters or half sisters as the case may be. If you requeen with a queen which has not mated with any African drones then the first generation queens will be free of any African genes. So swarms of supercedure queens will be okay. However since these first generation queens mate in an uncontrolled environment the female offspring may well be from African drone matings. Thus the hives temperment may be partially African, depending on the proportion of matings with African drones. The second generation queen cells may produce Afican queens which emerge a day earlier and ensure genetic dominance. It is these African queens that will cause the biggest problems as now the drone offspring are African. These drones are the ones that cause the spread of the Africanized genes far and wide. This is the reason for prompt requeening of suspected Africanized hives. The first generation only the workers are Africanized and it is a hive problem. This is an alert signal! The next generation it is the workers and the drones. Now it is not just a hive problem but a local problem and the drones are free to mate far and wide. So be quick about requeening cranky hives and keep the hive from making any queen cells that produce Africanized queens and there will be far fewer Africanized drones about. Happily here in Afican bee free New England, but requeening cranky hives anyway. Who knows maybe one of those southern queens did mate with an African drone! Jim Moore 2nd year, 5 hives Massachusetts