Institution: | (1) Botanical Institute of Basel University, Hebelstrasse 1, 4056 Basel, Switzerland;(2) Present address: Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, P.O. Box 7026, 75007 Uppsala, Sweden;(3) Department of Crop Production Ecology, Swedish University of Agricultural Sciences, P.O. Box 7043, 75007 Uppsala, Sweden |