A meeting place for rose breeders.
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Thank you for posting this Henry! A challenge is that sometimes the symptoms look a bit different from cultivar to cultivar, but it is great to have as many pictures of the range of symptoms for each virus as possible to have a good starting point. For Rose Yellow Mosiac Virus, for instance, not all cultivars show the necrotic stem lesions. It likely is the cause of rose streak disease reported many decades ago as the necrotic stem lesions seems consistent. NCPN-R is sure a great resource to help clean roses up and help with diagnostics for the different viruses.
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