Gad Loebenstein. Ph.D. Graduated from the Hebrew University of Jerusalem, and joined the Agricultural Research Organization, Volcani Center, Israel. He served as Head of the Department pf Plant Virology, Director pf the Agricultural Research Organization and Chief Scientist of the Ministry of Agriculture. His major research interests are plant virus diseases and natural resistance mechanisms of plants to viruses. His published work includes more than 200 scientific and technical papers. He was appointed as Adjunct Professor at the Hebrew University and at the Tel Aviv University, and at the latter as Professor Emeritus. He is a Fellow of the American Phytopathological Society, a Corresponding Member at the German Phytomedizinische Society and a member of the Kazakh Academy for Agriculture. In 1982 he received the Rothschild Prize for Agriculture. Dr. John P. Carr PhD in UK with Michael Wilson (1980-83), Postdoc with Dan Klessig (University of Utah and Rutgers University: 1984-1989), Research Associate with Milton Zaitlin (Cornell University: 1989-1993), own research group at Cambridge University since 1993 (Senior Lecturer in Molecular Plant Pathology).