Does this look like a rose virus or just nutrient deficiency. Practically every leaf on dozens of roses on sale today at my local GC were afflicted very badly with this problem. It looked a pretty shocking sight really, and I was amazed they were still on sale.
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https://www.rhs.org.uk/science/plant-health-in-gardens/pathology/projects/rose-viruses
I have to say, it looked much more serious than the usual nutrient deficiency we're all familiar with. So I will make a point of contacting the appropriate people.