1. Laboratory of Plant Pathology, School of Agriculture, Aristotle University of Thessaloniki (AUTH), POB 269, Thessaloniki, 511 24, Greece
2. Plant Pathology Group, Department of Biology, University of Kaiserslautern, Kaiserslautern, Germany
3. Laboratory of Agronomy, School of Agriculture, AUTH
4. Plant Pathology Group, Department of Biology, University of Kaiserslautern
5. Laboratory of Plant Pathology, School of Agriculture, AUTH