I have a growth on my plum trees. The only way I can descibe it is that it looks like poop on many if not all the branches. I have four plum trees, two Michigan plum and two flowering plum. Only the Michigan plum trees have this problem, today. What can I do?![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)