EPPO Global Database

Benyvirus necrobetae(BNYVV0)

Photos

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Typical external root symptoms of rhizomania showing the reduced size of the beet and root proliferation (bearding).

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Rhizomania Pocket Diagnostic lateral flow test kit. Top: lateral flow device- negative Bottom: lateral flow device- positive.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Foliar symptoms of rhizomania: pale green leaves, upright foliage, narrowed leaf laminae.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Microscope slide of Polymyxa betae cystosori.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Systemic symptoms on sugar beet leaves.

Courtesy: Institut Technique de la Betterave, France.

Foliar symptoms of rhizomania: yellow veining following the midrib of the leaf. Central Science Laboratory, York (GB) - British Crown

Abnormal root development (rhizomania) in beet.

Characteristic rootlet proliferation, or rhizomania, in sugar beet.

ELISA diagnostic test: yellow wells, when using alkaline phosphatase substrate, indicate a positive result - BNYVV is present.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Chlorotic lesions of BNYVV in Chenopodium quinoa.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

An Electron micrograph of immunogold - labelling of BNYVV virus particles.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Typical symptoms of rhizomania in the field: a distinct yellow patch of infected sugar beet.

Courtesy: Central Science Laboratory, York (GB) - British Crown.

Electron micrograph of rod-shaped virions of BNYVV, using the IEM method.

Longitudinal section of sugar beet root, showing browning of the vascular tissues.

Courtesy: Institut Technique de la Betterave, France.