Only problem with that device is that it will not kill the queen who is deep down inside the hole.
I vote for the Gasoline down the hole. It's quick and it works. Tried it before. Worked immediately. I used two cups instead of one. I was killing those great big fuzzy black and yellow bees. There was a hole the size of a golf ball in the ground and it looked like a very busy airport with all the bees coming in and going out....
Hope you are doing better this morning Nemo!