How to get rid of ants in a potted orange tree?
I have a dwarf orange tree growing in a pot, and millions of ants have taken up residence in it. They do not seem to be harming the tree, at least so far, but it can't be good for it. Its about a 6-gallon pot and it looks like the whole pot is one big ant nest. I once killed an Italian pine by spraying pesticide into the pot, so it needs to be some organic method. I put a bunch of diatomacous earth into the pot a few days ago.... this did not phase them one bit, there are even more now. I thought it was supposed to kill any/all insects?