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Spinach Yellow Dwarf Virus. Claude E. Thomas, Research Plant Pathologist, Plant Science Research Division, ARS, USDA, Weslaco, Texas 78596; R. S. Halliwell, Associate Professor of Virology, Department of Plant Sciences, Texas A&M University, College Station 77843; R. E. Webb, Investigations Leader, Vegetable and Ornamentals Research Branch, PSR, ARS, USDA, Beltsville, Maryland 20705. Phytopathology 63:538-539. DOI: 10.1094/Phyto-63-538.

Spinach yellow dwarf virus (SYDV) is a rigid rod with mean dimensions of 250 nm × 15 nm which aggregates into definite crystals within infected cells. In host range studies, SYDV was confined to spinach alone.

Additional keywords: electron microscopy, partial purification.