See Figure 3 "Mosaic and mottling pattern in an early infection with RRV."

"Mosaic and mottling of leaves are the earliest symptoms of infection (Figure 3), but these symptoms are not solely attributed to RRV as they can also be induced by other viruses infecting rose."

in this report:

http://www.uaex.edu/publications/pdf/FSA-7579.pdf

Here is a link that might be useful: link for above