1. Ecology, Diagnostics and Genetic Resources of Agriculturally Important Viruses, Fungi and Phytoplasmas, Crop Research Institute, Drnovská 507, 161 06 Prague, Czech Republic
2. Department of Plant Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic
3. Crop Research Institute, Prague, Research Station for Viticulture Karlštejn, Karlštejn 98, 267 18 Karlštejn, Czech Republic