Affiliation: | 1. Department of Plant Pathology, Cornell University, New York State Agricultural Experiment Station, Geneva, NY 14456, U.S.A.;2. Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, U.K.;3. Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, U.S.A.;4. Forest Research Station, Alice Holt Lodge, Farnham, Surrey GU10 4LH, U.K. |