Disease on walnut tree
Have recently bought a house and discovered what we believe are several walnut trees on the property. Most of them look ok, however at least two have dead sections (no leaves or anything) with black lumpy stuff growing on the branches. (no idea if that is what caused those parts to die or if it happened after) I haven't had any luck figuring out what this is, or what we should do about it. I'm guessing we should cut out the dead parts? The other parts of the tree look healthy with lots of nuts, so I'd like to try and keep them that way. Any thoughts?