Tobacco Streak Virus Infection of Tomato and Some Natural Weed Hosts in California. F. P. Cupertino, Department of Plant Pathology, University of California, Davis 95616. R. G. Grogan, L. J. Petersen, Department of Plant Pathology, University of California, Davis 95616; and K. A. Kimble, Moran Seed Co., El Macero, CA 95616. Plant Dis. 68:331-333. Accepted for publication 9 November 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-331.

Tobacco streak virus (TSV) was isolated from tomato (Lycopersicon esculentum), common yellow mustard (Brassica campestris), milk thistle (Silybum marianum), and wild radish (Raphanus raphanistrum) collected from three tomato fields near Sacramento, CA. All TSV isolates from these hosts were infectious to tomato cultivar Peto 81, causing necrotic symptoms on stems and leaves and ring spotting of fruit similar to symptoms observed in the field. The virus was seedborne in experimentally infected Chenopodium quinoa and naturally infected wild radish plants. Identification of the virus was based on symptomatology, host range, in vitro properties, morphology, and serology.