Fig. 2From: Sooty bark disease of maples: the risk for hypersensitivity pneumonitis by fungal spores not only for woodmanPlanar soot-like coloured spore layer of Cryptostroma corticale on a maple trunk under the peeled bark. Photo courtesy of Dr. Wolfgang PrĂĽfert (German Mycological Society, DGfM e.V.)Back to article page