I saw the exact same growth at small public rose garden today where I am volunteering. Part of the growth was normal with normal blooms and smooth stems, and then there's super-thorny growth with flowers still in bud on the same bush. Bush should be removed? A lot of other bushes were deadheaded around it using the same pruning shears without being disinfected! On the other hand, if the virus is carried by wind born mites, seems like it would be hard to prevent it or keep it from spreading.
