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
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.