Unfortunatly European honey bees do not cause genetic dilution. Queens mate with multiple drones and therfore each of her offspring can have one of several fathers. Queens with african fathers will reach adulthood a few days before their European halfsisters and will go around the hive and kill them in their pupae. Since there is usualy a good chance that in each hive in an area where Africanized Bees are active at least one young queen will have an africanized father, Africanization tends to concentrate itself.

There was a plan to create a barrier of european bees in the Isthmus of Panama but the bees reached the location before the plan could be implimented. A bee barrier was created further north where a mountian range reduced the area which needed to be covered. The failure of this barrier prompted the reasearch which discovered the early hatching of african bees.