Hello, Ants are living in the trunk of this apple tree. Why would they do this, and is there anything that can be done to save the tree? Thanks!
If the trunk is rotten and has cavities, ants will utilize the space as a home. Alternatively, they might just be using the opening as part of a protected path to another opening higher up. They could be "farming" aphids on the young apple leaves. This happens to my apple trees every spring, and I have to renew the ring of Tree Tanglefoot on the lower trunk to stop the ants.