So it is a 30+ year old collected large Boxwood. It is doing well and budding out off of old wood. On the nebari there are areas of dead wood that will eventually be carved out a bit and styled. Small black ants that were probably originally in rotted wood areas of the base are still nesting. As I dig back a bit into dead wood they come swarming out. Any advice on how to combat these? I could carve a bit and apply lime-sulphur ... would that do it? The tree was collected 30 days ago so wary of moving it at all. Any advice GREATLY appreciated. BTW have sprayed insecticidal soap on ants when they swarm out. Not sure if it really works on anything other than sap-suckers.