Wasps can be a serious problem to honey bees in the autumn when their other food sources have disappeared.

A strong colony will have no problem in defending itself. The Beekeeper must make sure that the entrance is reduced and that there are no other ways for the wasps to get into the hive. Wasp traps may be used or queens may be culled in spring, although this is ecologically questionable as wasps can consume a large number of garden pests throughout the summer.

European hornets may take the odd honey bee but are no more of a threat than wasps.

In completely a different bracket are Asian hornets. They have thrived throughout France and have recently made British shores. They are a serious threat to honey bees and can wipe out a strong colony in a matter of days. Follow the link on the left.
Vespa crabro
Vespa velutina
Vespula vulgaris
Scientific Beekeeping