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Serological Properties of Prunus Necrotic Ringspot and Apple Mosaic Virus Isolates from Rose. Rudolf Casper, Associate Professor of Plant Pathology and Foreign Research Associate, ARS, USDA, Plant Science Research Division, Department of Botany and Plant Pathology, Oregon State University, Corvallis 97331; Phytopathology 63:238-240. Accepted for publication 20 August 1972. DOI: 10.1094/Phyto-63-238.

Antisera against three isolates of apple mosaic virus (ApMV) and two isolates of Prunus necrotic ringspot virus (PNRV) were used in comparative serological tests against six virus isolates from hybrid tea roses. The isolates showed a wide range of serological reactions, but two isolates belonged clearly to the ApMV serotype, whereas three belonged to the PNRV serotype. One isolate reacted to a high degree with all antisera of both serotypes. These tests show the existence of a continuous spectrum of virus isolates from rose extending from the PNRV serotype to the ApMV serotype.