Rose mosaic virus
Rose mosaic virus may be a complex of more than one pathogen including Apple mosaic virus and Prunus necrotic ringspot virus.
Identification
Virus infection causes yellow, white, or brownish lines, bands, rings, vein clearing or yellowing, oak-leaf patterns, or blotches on leaves. Sometimes only a portion of the plant is affected.
Roses can also be infected by other viruses. A group of diseases that mimic some of the symptoms of Rose mosaic virus include rose spring dwarf and rose leaf curl.
Life cycle
Rose mosaic virus and most other rose viruses are not spread by insects or pruning tools. They infect roses through budding, grafting, or rooting cuttings from infected plants. Roses infected during propagation can be symptomless until after they are planted and begin growing in landscapes. Once a plant becomes infected with virus, it usually remains infected throughout its life.
Damage
Virus-infected plants may grow more slowly, produce delayed or fewer flowers, and become more susceptible to frost damage. The severity of damage varies with the host cultivar. Some infected roses exhibit no damage symptoms.
Solutions
There is no cure or treatment in landscapes for eliminating the viruses that cause rose mosaic disease. Replace infected roses if their performance is unsatisfactory. Purchase and plant virus-indexed plants, roses that have been tested and certified to be free of known rose viruses. Consult Pest Notes: Roses: Diseases and Abiotic Disorders and Rose Virus and Virus-like Diseases for more information.
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