When we were kids, not that I recommend this, but....we used to pour gasoline on it, let it soak in, then lite it on fire. Then every once in a while, take a pitch fork, lift into the pile, and when air hits the soaked in gas, it'll go poof. Don't know if it killed the whole colony, but man! was that fun!!
We had waaaaay too much time on our hands..... darn farm kids!!!