How ROSE ROSETTE VIRUS - Ask Extension
How do I know for sure if I have rose rosette virus on my roses?
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How ROSE ROSETTE VIRUS #937762
Asked July 02, 2026, 4:10 PM EDT
How do I know for sure if I have rose rosette virus on my roses?
Larimer County Colorado
Expert Response
Hi Cathy,
You would need to send samples to the CSU Plant Diagnostic Lab, located at Spur in Denver. Here's the website and the submission form "Pathogen Detection and Screening": https://agsci.colostate.edu/agbio/plantclinic/
There will be a fee to process your sample. If you want to call and ask what pricing is, the phone number is: <personal data hidden> or email <personal data hidden>
If you choose not to do testing, but suspect the virus, then it's best to remove the entire rose from the landscape and throw it in the trash.
You would need to send samples to the CSU Plant Diagnostic Lab, located at Spur in Denver. Here's the website and the submission form "Pathogen Detection and Screening": https://agsci.colostate.edu/agbio/plantclinic/
There will be a fee to process your sample. If you want to call and ask what pricing is, the phone number is: <personal data hidden> or email <personal data hidden>
If you choose not to do testing, but suspect the virus, then it's best to remove the entire rose from the landscape and throw it in the trash.
