Myrtilophobia

Myrtilophobia is the fear of blueberries.

This is most likely to come from the blueberry scene from charlie and the chocolate factory (or blueberry inflation in general), where eating a blueberry will cause you to swell up like one, this is when it's merged with Violetaphobia

(Note: You can be Violetaphobic without being Myrtilophobic and vice versa)