Are monkey puzzle trees susceptible to Gall rust? I have a friend who has an ancient one (50ft+) in her yard in Roseburg, OR. Last year it started turning brown and now only has about a 5ft crown at the top which is green. I don't live near by but this sounds like what happened to a pine tree in our yard in Grass Valley, California, so I told her I would look into it. Evidently the trunk has a lot of weeping sap as well. Any thoughts? Thanks!