Hi, My maple is about 5 years old. It has been doing great. But... Went on vacation last week and came home and all the leaves are dead. What happened? It happened early in the week only a day or two since we left. There is some saw dust at the trunk of the tree with two small holes. I did see about 6-7 small cenitipede looking bugs near the saw dust. I assume something has bored into the trunk and killled the tree, or the tree if fighting the bugs? What should I do to save my tree?