Knowledgebase

Maple leaf bumps #872540

Asked June 11, 2024, 12:19 AM EDT

I am starting to get bumps on some of the leaves on my Autumn Blaze maple tree. Should I be concerned and is there anything I should do? Thank you.

Hennepin County Minnesota

Expert Response

Hi Rolf,

These are maple leaf galls. There are tiny insects inside of those bumps, but they're harmless and only a cosmetic problem. The tree may lose a few leaves but the galls are no threat to you tree's health.

See more information here:

https://hort.extension.wisc.edu/articles/maple-gall-mites-eriophyidae/

Thanks!

MJ Replied June 11, 2024, 9:07 PM EDT
Thank you.

On Tuesday, June 11, 2024 at 08:07:49 PM CDT, Ask Extension <<personal data hidden>> wrote:


The Question Asker Replied June 12, 2024, 7:58 PM EDT

You’re welcome!

MJ Replied June 12, 2024, 8:02 PM EDT

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