The pinkish-red spots on your birch’s leaves appear to be erineum patches, which are a type of gall caused by very tiny eriophyid mites feeding on the leaf tissue. You will need a microscope to see ...
Add Yahoo as a preferred source to see more of our stories on Google. “What is wrong with my birch tree? I am seeing some odd-looking patches on the leaves.” — Deb Schultz, Evanston The pinkish-red ...
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