- Mosaic or mottles on leaves
- Line patterns
- Red or white patterns on leaves
Rose mosaic virus has a wide range of symptoms, including line banding, patterned yellow to whitish lines or spots in the leaves; chlorotic vein banding; mottles, mosaics, and a yellow net pattern. Reduced floriferousness (flower production), shorter internodes, reduced plant vigor, including a reduction in winter hardiness and survival are all symptoms of rose mosaic.
Once thought to be a single virus Rose mosaic virus (RMV), is now known to be complex, consisting of Prunus necrotic ringspot virus (PNRV) and apple mosaic virus (AMV). Other viruses have been associated with “rose mosaic virus.” RMV is transmitted by vegetative propagation of infected plant material. All grafting material of an infected plant can transmit the disease, and includes buds, scions, and root stocks. Another possible avenue of spread is through virus-infected pollen, although this is not considered a very important or successful avenue of transmission. Once infected, plants remain infected for the life of the plant.
As the disease is not infectious, removal is unnecessary. Virus infected plants can persist, flower, and remain attractive under good cultural practices. However, removal of infected plants, when unsightly, is recommended.
Pesticides are neither available nor recommended for managing this disease.
