What is this on my maple leaves
I'm a new homeowner in Michigan. I moved up here from Texas, which means I know nothing about trees.
I am not sure what is happening to our Norway maple in the backyard. A few of the lower branches seem to be dying. Leaves are shriveling and have something growing on them. (see picture) Entire branches (3inches in diameter) also seem to be dying. What can I do to stop this from spreading and does anyone know what it is?
Any help is greatly appreciated.