If'n anyone is ever tempted to leave the (push)mower running on top of the yellow jacket nest?
I got a chance one summer....
Even after pressure washing it and re-lubing everything, a few of the bastids still always followed that mower around for two more summers.
Two oz of gasoline in an empty water bottle and wait till bout 4a.m. then stick the bottle in the hole (neck down) and leave it be for a couple of days.
Leaving the bottle in the hole (and no fire nonsense) lets the fumes take out the stragglers that show up over the next couple of days.