Surprised nobody has mentioned a pound or so of tannerite..
I kersploded some fire ant mounds years ago , probably 20-25 years ago.
I didn't use tannerite
Mike
So how'd it work?
I put the charge on the end of a piece of re-bar & pushed it down in the mound about 2'. No big boom when it went off , just a thump. It worked great because it got the queen.
As others have said , killing the queen is the key.
Mike