Autumn Blaze Maple - Bleeding Canker
I'm told the bleeding canker rising on my 25 year-old ABM is caused by a fungal root rot - unspecified fungus in the soil - that seems to have developed within a year or two. Questions: Should I be concerned about it spreading? Do mature trees become infected at random like this or is there a trend happening? Is removal urgent and is there a reason it couldn't wait until winter? Is there any issue with stacking and burning clean wood (above the lesions)? Thanks.
Dakota County Minnesota