Our solution is to place a 15 kg (or any large) pail outside with a
>> little honey in the bottom.  This attracts these hornets in quantity.
>> Occassionaly we will place a lid loosely on the pail and spray inside
with
>> something like RAID.  In a few minutes remove the lid and collect a new
>> batch.  No need to clean out the pail between treatments

Since I am an organic gardener/beekeeper, I use a similar method of luring
pests into a SMALL bucket, snap the lid down tight when I capture some and
stick it in the freezer.  I dump the carcasses into the compost or feed to
the chicken when dead.