How to get rid of fire ants?

I have a question which I like to know. That is how to get rid of fire ants? I do not like to see fire ants but they are up in the garden. They are two mango trees at the garden. That attract the fire ants and it has nests up the trees too.

The mango is not sweet and it is very sour. The mango is good to cook for curry! The malay loves them. I know because a friend told me that her colleague used them to cook curry fish lemak.

The smaller the mango the taste will be better.