Q&A – What are these bumps on my Tupelo tree leaves?

Question:
What are these bumps on my Tupelo tree leaves?
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Answer:
These are bladder galls caused by an eriophyid mite. UT Extension Agent Celeste Scott says it is only cosmetic and does not harm the tree. She talks about different kinds of galls this small insect can cause.
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Related Resources:
Galls on Shade Trees and Shrubs
Insect and Mite Galls