I recently moved and there is either an apricot or plum tree in the backyard which doesn't look healthy. The leaves have lots of small holes throughout them.

There are a couple of other fruit trees in the yard,, and one of the cherry trees was really sick last year and had all of these black growths over the branches and this year was dead.

I'm wondering if whatever that tree had has now spread to this tree, although the symptoms look different.

Does anyone have any idea what it could be, and how I can help it?