Rose Rosette or Normal - Ask Extension
I’m trying to find out if my roses have normal new growth or if it’s rise riosette disease. These are double knock out roses.
Knowledgebase
Rose Rosette or Normal #876937
Asked July 12, 2024, 9:27 AM EDT
I’m trying to find out if my roses have normal new growth or if it’s rise riosette disease. These are double knock out roses.
Macomb County Michigan
Expert Response
Hi Jennifer -
I will start by saying that I am not a rose expert. However, after looking closely at your photos, I have looked for signs of Rose Rosette disease and I really don't see that problem. However, I do see other problems. First, Rose Rosette disease is caused by a virus: https://www.canr.msu.edu/news/rose_gardeners_should_learn_the_symptoms_of_rose_rosette_virus
I don't see the signs of it on your roses. One rose, the third photo, seems to have a large, red, new growth on it. I think that this *might* be (please look and check) coming from the graft. Does that growth go all the way down to the ground level? If so, that's an unwanted growth from the graft.
I also think you have black spot or cercospora leaf spot on your roses. https://gardeningsolutions.ifas.ufl.edu/care/pests-and-diseases/diseases/black-spot-vs-cercospora-leaf-spot-on-roses/
Last but not least, there is some chlorosis on the leaves in photo 1 and 3. This is usually a sign of lack of nutrients https://hortsense.cahnrs.wsu.edu/fact-sheet/common-cultural-chlorosis/.
I know this is a lot of information, but I hope it helps you.
I will start by saying that I am not a rose expert. However, after looking closely at your photos, I have looked for signs of Rose Rosette disease and I really don't see that problem. However, I do see other problems. First, Rose Rosette disease is caused by a virus: https://www.canr.msu.edu/news/rose_gardeners_should_learn_the_symptoms_of_rose_rosette_virus
I don't see the signs of it on your roses. One rose, the third photo, seems to have a large, red, new growth on it. I think that this *might* be (please look and check) coming from the graft. Does that growth go all the way down to the ground level? If so, that's an unwanted growth from the graft.
I also think you have black spot or cercospora leaf spot on your roses. https://gardeningsolutions.ifas.ufl.edu/care/pests-and-diseases/diseases/black-spot-vs-cercospora-leaf-spot-on-roses/
Last but not least, there is some chlorosis on the leaves in photo 1 and 3. This is usually a sign of lack of nutrients https://hortsense.cahnrs.wsu.edu/fact-sheet/common-cultural-chlorosis/.
I know this is a lot of information, but I hope it helps you.
