Black Walnut Leaves Have Yellow Bumps

Question From: R. Michel - Albany, New York, United States
Q: Hi Nancy There is yellow bumps on my black walnut leaves. The tree is a baby 2ft tall. What is wrong? and what can I do to fix it? Thanks Robert Michel

A: Sounds like leaf spot. If the leaves remain on the tree and the spots do not turn black it's probably fine. If they drop or change color treat it with a tree fungicide. Best And Happy Yardening, Nancy