spiky looking things growing on cedar bushes

Question

I have these creepy, round, spiky looking things growing on my cedar bushes. What are they? There are several on one bush, yet none on the adjacent bush.

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Answer 1

That gall is the result of cedar apple rust. More information on cedar apple rust and a course of treatment can be found in the following articles:

https://www.gardeningknowhow.com/edible/fruits/apples/cedar-apple-rust-control.htm
https://bit.ly/1KZyuZ0 (PDF)