Rose bush disease - Ask Extension
Hello, I see evidence of disease on this rose bush but am not certain the cause. Its location is Patterson park
Knowledgebase
Rose bush disease #869712
Asked May 23, 2024, 5:50 AM EDT
Hello, I see evidence of disease on this rose bush but am not certain the cause. Its location is Patterson park
Baltimore City County Maryland
Expert Response
If you intended to share photos, we unfortunately did not receive them. You can try again to attach any files you wanted to share (if it's not working, just paste the images into your reply), and try to make sure they are at least 1MB in file size so we can zoom-in if needed. You can also compare what symptoms you're seeing with the information in our rose diagnostic page. Rose rosette virus and black spot tend to be our most common diseases seen, but there are other conditions possible, and sometimes red new growth (which is normal for many varieties) is mistaken for the viral infection.
Miri
Miri
Thank you I will attach two images to this email reply!
Thank you for the photos. It looks like there are symptoms of fungal disease(s) -- cercospora leaf spot and possibly black spot also. Both would be treated the same way. Refer to our information on diseases of roses. Pruning of branches with spent flowers can be done now, which will push new growth. Any pruning shoud be done prior to the end of July. It's not unusal for new growth to have a reddish color on some types of roses.
Christa
Christa
