I keep seeing threads about trees suffering and losing leaves early. I don't know what it has been like in East TN this year, but I am almost certain the weird weather has caused or contributed in the majority of cases. It must make the trees more susceptible to my mind. I would practice as good housekeeping as you can, clear up every speck of stuff off the ground, and maybe spray around as well as the tree, then keep your fingers crossed for a more normal season next year. Best of luck.