What is this? Fungus? Eggs?

Asked September 12, 2015, 9:57 PM EDT

What is this? Fungus? Eggs?

Baltimore County Maryland leaf galls insect id

1 Response

Although the black protuberances on the leaf are similar to 'tar spot' fungus, the age of the leaf suggests that they are probably old leaf galls. In either case, they are harmless to the tree. Simply rake them up and dispose of them.
LS