Affiliation: | J. Vahala. Dept of Plant Biology, Plant and Forest Pathology Section, Univ. of Helsinki, P.O. Box 28, FIN‐00014 Univ. of Helsinki, Finland;;C. D. Schlagnhaufer, Dept of Horticulture. The Pennsylvania State Univ., University Park, PA 16802. USA;;E. J. Pell (corresponding author, e‐mail;), Dept of Plant Pathology and Environmental Resources Research Institute. The Pennsylvania State Univ., 211 Buckhout Laboratory. University Park, PA 16802, USA. |