Maple Cankers !!??!! Oh No!
Does anyone know anyone, arborist, hobbiest, human being, in the Washington, DC/Maryland 'burbs who knows anything about maple tree fungus?
I have these cankers developing on 2 of my red maples (Red Sunset and October Glory) at the root collar. They look like lawn mower damage where water got in and caused the bark to separate in long-ish strips. The wood underneath is clean for awhile, then it develops a knot.
I noticed this has spread to an English Hawthorn about 15' away, and yesterday, a small maple (a beautiful Brandywine) on the opposite side of the yard about an acre away has the same look.
The tops of the trees are healthy -- so far.
I'm wondering if this is what caused a Crimson Sentry not to come back this last spring. I don't know if I'm imagining I remember the bark stripping, or if it actually happened.
Anyway, I talked with a Forestry guy, who tells me it's definately a fungus. He was honest, however, in telling me that was as far as his expertise goes and I should look for someone specializing in maple cankers. I've sent an email and called the person who is supposed to be my extension office, and am awaiting a response.
I'm a little freaked about this, because I have another Brandywine, a Somerset, a Sangu Kaku, Autrolinear, an London Plane tree, and about 30 JM saplings on this side of the yard alone. Since it's jumped speicies in some fashion, I'm worried. I've planted over 59 trees in 4 years, and have 130 JM saplings I can't bear to think about losing!
I'm going to ask on the tree forum, but I thought I'd start here in the Home of Maples :)
Happy holidays and thanks to all!