David Viburnum - Ask Extension
I have a David Viburnum which I planted 3 years ago. In the last month It has developed yellow leaves with black spots on 1/4 of the plant, mostly on...
Knowledgebase
David Viburnum #871073
Asked June 01, 2024, 3:46 PM EDT
I have a David Viburnum which I planted 3 years ago. In the last month It has developed yellow leaves with black spots on 1/4 of the plant, mostly on the underside. Do you know what could be causing this? Is there a recommended treatment? The same yellow leaves with black spots are appearing on a Girard's Pleasant White Azalea which I also planted 3 years ago. Is the cause contagious? Should I tear out both plants?
Clackamas County Oregon
Expert Response
Hi Cheryl,
Thank you for using Ask Extension. Pictures would help, but since you said it is affecting a viburnum and an azalea, it might be
Viburnum-Ramorum Leaf Blight and Shoot Dieback | Pacific Northwest Pest Management Handbooks (pnwhandbooks.org)
If you purchased both of these plants from the same nursery, they may have been infected at purchase.
Thank you for using Ask Extension. Pictures would help, but since you said it is affecting a viburnum and an azalea, it might be
Viburnum-Ramorum Leaf Blight and Shoot Dieback | Pacific Northwest Pest Management Handbooks (pnwhandbooks.org)
If you purchased both of these plants from the same nursery, they may have been infected at purchase.
