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Symptomatically Distinct Strains of Tomato Ringspot Virus Isolated from Grape and Elderberry. J. K. Uyemoto, Assistant Professor, Department of Plant Pathology, New York State Agricultural Experiment Station, Geneva 14456. Phytopathology 60:1838-1841. Accepted for publication 28 July 1970. DOI: 10.1094/Phyto-60-1838.

Leaf samples of Dutchess (Vitis labrusca) and Riesling (V. vinifera) grapevines in New York yielded three symptomatically distinct isolates of tomato ringspot virus (TmRSV). One isolate induced large chlorotic lesions on inoculated leaves of lima bean and necrotic bordered ringspot in snapdragon. A second induced large necrotic local lesions and necrotic line patterns in lima bean and snap-dragon, respectively. A third grapevine isolate and an isolate from elderberry (Sambucus canadensis) were symptomatically similar, but differed from the other grape isolates. These isolates failed to induce symptoms on the inoculated leaves of snapdragon and lima bean. All isolates were identified as strains of TmRSV, and appear to represent a single serotype.

Additional keywords: Tomato ringspot virus purification; tobacco ringspot virus serology.