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Nature’s artwork? #940477

Asked July 25, 2026, 10:10 AM EDT

A friend found this at her Gunflint trail cabin. What is happening here?

Cook County Minnesota

Expert Response

Thank you for reaching out.

They definitely have some type of leaf miner. My app calls it an aspen leaf miner. While infestations look severe, they rarely kill healthy trees, and no chemical treatment is usually necessary. It is very attractive !

Deb Kroon Replied July 25, 2026, 5:41 PM EDT

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This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

Nature’s artwork? #940477

Expert Response

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