Question: I’m seeing yellow spots on my Lil’ Ditty Witherod Viburnum and the leaves are starting to curl. I cannot see any insects though a nearby different variety Viburnum has visible aphid activity & curling leaves. Answer: Jonathan Foster, Home Horticulture Outreach Professional I’m sorry to hear about the viburnum issues.The visible aphid activity on read more What could be causing my Viburnum to have yellow spots and curled leaves?