Tree bark disease

[HogHQ39]

Has anyone seen this before on tree bark? It is some sort of disease that is killing some the trees around the areas that I hunt. I have mainly seen it appear on oaks and elms. It makes the bark white, powdery and eventually the bark flakes off.

 

[XYZ]

I lost some trees around my place this year too. They just went from healthy to dead in a couple months.

 

[GnometownHero]

I have 3 oak trees in my yard that are now dead standing and dropping big limbs regularly.
The wood is punky and doesnt even make good firewood

 

[Okiedog]

Hypoxylon Canker of Oaks

This 3-page publication discusses the symptoms, causes, and control methods to use to keep Hypoxylon canker at bay.

agrilifeextension.tamu.edu

I suspect this is what you have. Wiped out a lot trees on our place several years ago.