Shumard Oak disease
I planted several 30 gallon Shumard Oaks last spring both at work and at home near Houston, TX. By mid summer I noticed the trunks looking like the upper photo. I have treated them with Aluminum tris (O-ethyl phosphonate) 80% AKA Phosphite. They now look like the lower photo or worse.
Does anyone know what disease is at work here and what the prognosis for these trees are?