Wasp Cannot Enter hive entrance I

Wasp unable to enter hive with no disturbance of colony entrance

WASP CANNOT ENTER HIVE ENTRANCE II

Wasp unable to enter hive as a result of improved defensive qualities of the modified entrance in a bee hive. Replication of nature  for the European honey bee that typically produces less propolis than African species,

Robbing is increased in smaller, weaker colonies without modified entrances

Robbing of hives leads to fighting and deaths