What is the best way to introduce a queen of one race to a hive of another? I am trying to introduce Carniolan queens to hives of Itialians and Buckfast. Pulling the old queen for a day or two before does not work, when the queen is released they try to kill her. Making a nuc and waiting a day does not work either. Spraying with sugar water, liquid smoke or arrid xtra dry doesn't work.
Surely the is a way to do this without losing the queen.