Rhizomania is a plant disease of the Chenopodiaceae family caused by the development of a virus called BNYVV (Beet Necrotic Yellow Vein Virus), which is introduced and transmitted by the soil fungus Polymyxa betae.
Rhizomania is a virus disease which may cause heavy losses in yield and quality.
- patchy yellowing of beet leaves in the field
- long petioles, narrow leaf blade
- stunting and development of a root beard
- browning of the vascular bundle rings after cutting
- increased sodium content
- reduced sugar content
- reduced amino-nitrogen content
- yield loss
Evidence of the disease: ELISA test in the laboratory
A chemical control of Rhizomania is not possible, the only useful measure at present is the growing of† tolerant varieties. A permanent solution to the problem of controlling Rhizomania can only be obtained by resistance breeding and may be achieved by genetic engineering.