Emaravirus rosae
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Author(s): Sandra Jensen, Cornell University
Source: IPM Images
Author(s): Richard Gardner, UMES
Source: IPM Images
Emaravirus rosae
Assigned virus:
• rose rosette virus (RRV)
The rose rosette virus is found in North America and causes the rose rosette disease. The disease has been first described in the 1940s. It has been also reported from India (Chakraborty et al., 2017). The virus can cause epidemics and losses of roses in gardens and landscapes has been high.
The symptoms include witches broom/rosette-type growth, excessive thorns, discoloured and distorted growth, and, unlike most other rose diseases, usually results in plant death. It is transmitted by the eriophyid mite (Phyllocoptes fructiphilus). Breeding for resistant cultivars is ongoing.
The genome consists of linear negative-sensed and single-stranded RNA, like in other emaraviruses. The RNA was originally reported to have 4 segments like in the type species of the genus. However, 3 additional segments have been described later.
For a review of the virus see Pemberton et al. (2018).
