A tall (@ 35 ft.) sugar maple in my front yard has white wooly insects on the under leaves. They are like fluffy scale or mealy bugs like houseplants get. When I stand under the tree and look up I can see them. The tree is really infested and I do not know what to do. There is no way I can spray high enough, if I knew what spray to use and could afford it. Is this something that will eventually kill the tree over time and I should just treat it as a normal event? There is another maple of about the same height, but a different variety growing 35 feet away and it does not have these mealy bugs. I have called my extension service about this but no one has called me back. Can you advise me?