Carol,
I've got that too!
I have such fine dirt they love that stuff. I have several hills. Things have been soo busy for me, and haven't gotten around to taking care of it, but I've been taking peeks into some info on it, I've read about boiling some water and pouring directly on it......
(Ants are a sign some times you have aphids, do you see any of those, they like to herd the ants to get the honeydew stuff they produce.~ I had some on my Cherry
tree this year, because I didn't get to them fast enough.
Planting pots of tansy, (do not
plant tansy in your garden, it's an invasive little bugger) It's suppose to be an insect repelant.???
Again, I'm not a big chemical fan, so maybe some one else can help you in that dept.
Good luck!
Weezie