Knowledgebase
What is this? #752006
Asked May 25, 2021, 10:23 AM EDT
Sussex County Delaware
Expert Response
Hello!
Thank you for your question. I imagine these alien looking things are quite surprise, especially earlier in their life cycle where those orange protrusions are much more of a brighter orange. These are the galls of the Cedar Apple Rust fungus. This is a naturally occurring disease that occurs on Eastern Red Cedar and also affects apples. I would suggest removing the galls by pruning to prevent further spread, especially if you have apple trees near. Here is a fact sheet with more in depth information: https://hgic.clemson.edu/factsheet/cedar-apple-rust/
Please feel free to reach out if you have additional questions!
Blake - <personal data hidden>
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