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Viburnum Shrubs

Q.What Is Infecting The Leaves On My Viburnums?

Zone 6, Ypsilanti MI | Marcia Krook added on August 12, 2021 | Answered

I noted white (roundish) growths on the underside of a number of leaves of my “blue muffin” viburnums. They line up at the joint of the veins. On the top side, they show as linear bumps along the main vein: the leaves curl up some on the edges. I don’t know what this is but I will try to attach photos of these visitors. I couldn’t seem to get a photo of the topside due the leaf curling. It is hard to get a clear photo of this invader.

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Certified GKH Gardening Expert
Answered on August 13, 2021

Unfortunately, your photos are blurry. If you cannot get a clear picture on auto, you will have to adjust your focus, manually, to the lowest setting. Or you can take a picture further out, and crop the photo to the pest in question. This will produce a more clear photo.

In the meantime, a broad spectrum insecticide will be a good starting point. These articles will help:


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