I was hoping someone would know what this grey fungus/spore looking stuff is on this Hawthorne tree. I have attached a few photos...... Thanks for any input you might have. The lady who owns the tree has been told to remove it but I really don't think that is necessary. I want to help her determine what the problem is and treat it appropriately so that she can continue to enjoy her tree.
Hello Harlow Looks like cedar hawthorn rust see this link http://www.urbanext.uiuc.edu/focus/cedarhawthornrust.html
Gymnosporangium rust. Alternate hosts junipers and hawthorns ("cedar hawthorn rust" is an error, it doesn't attack cedars).
