One of our hemlocks has a neat ring of sawdust around its base, with a few visible ants nearby. Firewood stored close to it last summer may have been infested. If this is ants or termites, can it be treated, and how should we proceed?
Treat the base and entry area with boric acid. Roach aid can be found at any hardware store. Repeat after rain and this should take care of the ants.
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