We had a very large underground wasp nest in our garden when I was younger, (the type with only a little hole on the soil - lots off the evil little buggers flying in and out)
My brother had been to France on an exchange trip and bought me back a packet of Bangers , god they were powerful, and small enough to pop down said hole !
So - I took one and wrapped it in about 10 layers of insulation tape, and delivered it accordingly...
Needless to say the remaining wasps in the foot wide crater moved on fairly sharpish