Maple Spindle Galls: Cosmetic Only, No Treatment Needed

Question: Maple tree: 1/8″ pink-red protrusions on leaves (5–50/leaf). Sevin didn't help. What are they?

Answer: Maple Spindle Galls (Eriophyid Mites)

• 1/5″ long, pencil-lead thick, stand erect
• Soft & sugar maples affected
• Mild winters → excessive galls

Impact

Only aesthetic + possible early leaf drop. No real health harm. Trees often refoliate in June.

Why Sevin Failed

• Spray window = exactly when new leaf buds open (very short)
• Once gall forms, spray useless (mite inside)
• Timing nearly impossible for homeowners

Recommendation

Don't worry. Don't spray. Galls look weird but don't hurt the tree. Enjoy the shade.