SUMMARY A French isolate of beet necrotic yellow vein virus has rod-shaped particles of four predominant lengths (85, 100, 265 and 390 nm), and a width of about 20 nm. Virus preparations yielded four nucleic acid components of apparent mol. wt. 2.3 × 106, 1.8 × 106, 0.7 × 106 and 0.6 × 106 respectively, and a single protein of mol. wt. 21000.
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C. Putz (1977) studied this question.