Beet necrotic yellow vein virus

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Beet necrotic yellow vein virus
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BNYVV on in sugar beet
Scientific Classification
Family: Plasmodiophoraceae
Genus: Benyvirus
Species: Beet necrotic yellow vein virus
Beet necrotic yellow vein virus

Beet yellow vein virus
BNYVV Rhizomania
Rhizomania disease

Root madness

Beet necrotic yellow vein virus is a plant virus transmitted by the protozoan Polymyxa betae. Polymyxa forms highly resistant spores that can rest in soils for more than two decades.[1][2]

Symptoms[edit | edit source]

Sugar beet[edit | edit source]

Proliferation of thin rootlets, and leads to a smaller tap root with reduced sugar content. Infected plants are less able to take up water, and wilting can be observed during the warm period of the year. If the infection spreads to the whole plant, vein yellowing (Not seen in the UK), necrosis and yellow spots appear on the leaves, giving the virus its name.[1]

Prevention[edit | edit source]

Control measures include; cleaning soil from agricultural machinery after harvesting beets, avoiding the re-introduction to the farm of factory by-products, careful disposal of waste from seed processing and importing seed potatoes from rhizomania-free areas. Disease-tolerant sugar beet cultivars are widely used in affected regions.[3]

Hosts[edit | edit source]

The disease effects Beta vulgaris subsp;

Gallery[edit | edit source]

References[edit | edit source]


  1. a b Adams, M.J. (1990). Epidemiology of fungally-transmitted viruses. Soil Use and management 6: 184-189
  2. Maraite, H. (1991). Transmission of viruses by soil fungi. In: Developments in agricultural and managed-forest ecology: biotic interactions and soil-borne diseases, Amsterdam, NL. Elsevier Science Publishers, pp 67-82
  3. Harju, V. (2003). Protocol for the Diagnosis of Quarantine Organism - Beet necrotic yellow vein virus. Central Science Laboratory, Sand Hutton, York.