Question From: L. Kells - Chicago, Illinois, United States
Q: These photos show what a very knowledgable friend has identified as woolly adelgid. I can find nothing on these pests infesting Arborvitae. Can you help?
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I suggest you contact the folks at the Morton Arboretum. To my knowledge adelgids do not feet on arbs. Mealy bugs do. Google photos of mealy bugs feeding on arborvitae and see what you think. Best And Happy Yardening, Nancy