I'm brand new here, and not certain that I'm even doing this right, but I live in Ohio and need advice on what to do with a butternut tree. The canopy is fine, there are plenty of new leaves at the top, but the bottom branches seem to be dead. I'm not sure if there is any canker sore illness on this tree, from what I read on Google that is not the problem. I hope somebody can tell me whether it is best to take the Deadwood off or leave it on. Thank you very much in advance, Sam.