I'm mainly bumping your post so more people will see it.
Your pictures don't enlarge, clicking on them just takes me to an image shack page of links, so it is difficult to see much detail.
Failing an answer here, you might just bag up some leaves showing the disease and take them to your local University botany/ag dept, agricultural extension services, or a knowledgeable local garden store (NOT big box!).
One thing that occurs to me is about the bees and wasps. They are not usually attracted to a tree that isn't flowering or dropping fruit. But several insects that suck plant juices (e.g. aphids, mealybugs, scale insects) excrete the excess sugars they take in, in the form of a sweet sticky substance called honeydew. The honeydew is attractive to the bees and wasps. I would check your tree carefully including stems and undersides of leaves for bugs like this (scale insects don't move and just look like little bumps). If you have an infestation of insects like this, it could be responsible for some of the other problems. They can carry diseases and/or the honeydew can attract molds.
Let us know what you find out!