Dieing Ohias do not seem to meet definition of ROD

[Justin]

Could just be run of the mill fungus. They have finicky roots also, and if those get disturbed by being crushed or something else, they have problems with uptake. That being said, if it were an uptake problem, the upper leaves would die first, not the lower leaves. Try drenching the root area with a fungicide and see if that helps at all.