Turning black

Asked May 31, 2019, 1:53 PM EDT

Dear Experts I have two Viburnum nudum Brandywines on the west side of my house with some shade and afternoon sun. Some branches and leaves have suddenly shriveled and turned black while so far, the rest looks healthy. I don’t see any insects. Might you have suggestions? I cut off the affected branches. Photos attached. With thanks, Sincerely,

Baltimore Maryland shrubs viburnum botryosphaeria canker

1 Response

We looked at your photos. The browning/black on the foliage/branches looks like Botryosphaeria, a fungal disease. This is a type of fungi that causes cankers and girdles the stems. There are no chemical controls. All you can do is prune back to healthy tissue. Keep the plants watered during dry periods. Make sure mulch is no thicker than several inches and away from the base of the stems. Here is more on our website https://extension.umd.edu/hgic/topics/cankers-trees-and-shrubs