We have Low grow sumac planted last year on a hill to keep erosion down. They have been growing good and leaves are green but on what seems to be the new growth this year, the leaves have little growths or spots on the leaves. Can you tell from the pictures attached what this might be? Someone mentioned it might be Gall, like some maple trees have this year. I need to know if it is and how to treat it. We also put in a few new low grow sumac a couple months ago, and they don't have it on them. Thank you for your help. Roseann