necrotic bark on malus sylvestris any ideas

[coryn]

hi been trying to identify this disease that i have seen on several ornamental crab apple trees in my area. the bark looks diseased and peeling with a brown slim in places. have seen over the last two or three seasons and the foliage appears healthy. hope someone can help

[coryn]

the photos are from three different tree. i believe all are malus

[Tony Croft aka hamadryad]

street trees are used for sharpening car bumpers, simples

[coryn]

True. Street trees have a hard time of it. Some thing like that might have caursed an initial wound but wondering what the resulting infection might

[Tony Croft aka hamadryad]

  coryn said:

True. Street trees have a hard time of it. Some thing like that might have caursed an initial wound but wondering what the resulting infection might

 

a mixture of bacterial and fungal issues