Help! I have three trees that I believe to be ash. One quite young and two...

Asked May 27, 2014, 11:24 AM EDT

Help! I have three trees that I believe to be ash. One quite young and two that are close to 100 years old. Last year I noticed a bumpy discoloration on the leaves of the young tree and now it has spread to one of the beloved old ones. What is it? How should I proceed to fix it? I hope my picture is enough, but will take more if helpful.

Anne Arundel County Maryland trees and shrubs ash trees rust

1 Response

The leaves on your ash tree look like they were subject to rust, a fungal disease. Raking fallen leaves is what we recommend. Spraying the entire tree is very costly. The rust will not kill the tree. Please be aware of the emerald ash borer which is killing ash trees in Maryland. See the attached link
http://extension.umd.edu/hgic/invasives/emerald-ash-borer
mh