"africanized" is basically meaningless now. All bees are hybrids now, and they are either agressive or non-agressive. Has to do with the queen. Friend says that they are having agressive hives come up from Texas every year now, and what you do is take out the queen, replace her with a different one (that has been cultivated in a non-agressive hive) and 3 weeks later all of the old queens kids are dead and are replaced by the new children. Friend says that you cannot find bees, even in the wild, that do not have some of the african genes in them. The agressive tendancies though are not throughout all those with the genes.
Fast turnover in the hives. Short worker lifespans.
Tom