Family: Unallocated
Genus: Benyovirus
Acronym: BNYVV
BNYVV Synonyms: Beet rhizomania virus
BNYVV is the causal agent of rhizomania, one of the most economically destructive beet diseases.
Symptoms of rhizomania include yellowing, chlorosis, necrotic vein yellowing, crinkling, wilting and stunting. The virus also produces yellow mottle and stunting in spinach.
In nature, it infects sugar beet, fodder beet, Swiss chard and spinach. The disease is usually distributed as foci (patches) in the sugar beet field. The most useful leaf symptom is visible at ... more info
Family: Unallocated
Genus: Benyovirus
Acronym: BNYVV
BNYVV Synonyms: Beet rhizomania virus
BNYVV is the causal agent of rhizomania, one of the most economically destructive beet diseases.
Symptoms of rhizomania include yellowing, chlorosis, necrotic vein yellowing, crinkling, wilting and stunting. The virus also produces yellow mottle and stunting in spinach.
In nature, it infects sugar beet, fodder beet, Swiss chard and spinach. The disease is usually distributed as foci (patches) in the sugar beet field. The most useful leaf symptom is visible at the end of the growing season. Leaves become pale green in colour, with long petioles and upright growth. Symptoms are characterized by root stunting and proliferation of lateral rootlets on the main tap roots, and yellow-brown coloration of vascular bundles. These typical root symptoms give rise to the name "rhizomania".
In early and severe infection, the plants are stunted, wilted and eventually die. In this condition, the bright yellow colour followed by necrosis along veins (giving the virus name "necrotic yellow vein") is very rarely seen. This symptom only results from movement of virus to leaves. Infection late in the season may produce no obvious symptoms.
