Spots are irregular to almost circular, three to seven mm in width. Spray as recommended for anthracnose. The orange swellings are more common early in the growing season, particularly in the Gulf Coast area. Spraying with fungicides at two to three week intervals during early spring will control the disease. Ash is moderately susceptible to the cotton root rot fungus, particularly during the younger stages of growth.
Infection usually takes place through wounds caused by lawn mowers, pruning, or strong winds.
Trees decline slowly for no apparent reason and the fungus slowly rots the wood. These are fruiting bodies of the fungus appearing as bracket growth during certain times of the year. Control is accomplished by avoiding mechanical wounds, treating exposed wounds with pruning paint, fertilizing trees as needed and protecting from insects. White powdery fungus growth on the leaves during the summer, then forming small black round fruiting structures in the late summer and fall. Damage is usually not extensive enough to warrant control.