Ant mounds

Haus

5 year old buck +
I’ve had some large ant mounds pop up next to my chestnuts that I have in tubes. Can they be harmful to trees? If so, what would be the best way to get rid of them?
 
I spray the mounds, and around it with permethrin. It seems to wipe them out that year, but they seem to come back in the same spot the next year.
 
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