read this: http://www.hdra.org.uk/factsheets/pc1.htm

"donald girod" wrote in message
...
By any chance, will sprinkling borax on an ant hill eliminate the colony
(assuming a few dry days)? I have a number of ant hills (the kind that
will
get a couple of feet tall if you let them) starting in an area where I
mow,
and this is fairly undesirable. They could just go somewhere else, but I
don't think they will. I think borax is effective against them, and it
seems to me that sprinkling it all over the exposed surface is going to
mess
them up pretty good, but what do I know?