sooty bark disease rußrindenkrankheit caused by the fungus cryptostroma corticale on a dead maple tree

acer anhalt bark characteristic coniosporium corticale crop cryptostroma danger dangerous dead deadwood death decline disaster disease environment environmental 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 russrindenkrankheit rußrindenkrankheit saxony soot spores sycamore symptom timber tree trunk vermin wood