Black Knot Disease in plum trees
I understand that I must prune out the branches with the galls. I notice that infected branches will also have twigs that are abnormally shortened and look "scrunched up" I'm assuming that these are infected and will also have to be pruned. After that (winter) what sort of fungicide should I use, and do I use this on the plum trees that are not infected? And can this disease infect red maples? The tall ones in my adjacent woods also have a gall, not as black.
Newaygo County Michigan