sooty bark disease caused by the fungus cryptostroma corticale

acer bark caused characteristic corticale crop cryptostroma danger dangerous dead deadwood death decline disease forest forestry fungal fungi fungus hazardous health ill illness indication infection infestation log lumber magdeburg management maple mycosis parasite parasitic pest plant protection pseudoplatanus rind risk saxonyanhalt soot sooty spores sycamore symptom symptoms timber tree trunk vermin wood