This page lists several weird methods that it claims will kill ants. Some of the methods claim that ants can’t burp, so if they eat something like Minute Rice that expands in their stomachs, they’ll die. This sounds suspiciously like the urban legend about birds dying if they eat rice at a wedding. I looked at the source of the “tips” for the article and it is this guy who is trying to sell books. Never trust anyone who’s trying to sell you something. My personal conclusion is that you can’t kill ants. There is no way you can defeat a den. Ask the red ants in our back yard. This is why we need to work on tiny remote-control robots with lasers to go after the queens.