My parents seem to have a large problem with fire ants in their backyard. They're more of an inconvenience than anything.
What seems to be the most effective method (chemical, or a technique based, etc; doesn't need to be a specific product) of removing fire ants without harming or hurting any neighboring vegetation? Also, please provide a reason why.
We don't have any trees (How do I control fire ants in the mulch around my tree?) in the backyard thus the reason for this post.