Knowledgebase

Maple tree leaf spots #935765

Asked June 16, 2026, 5:25 PM EDT

A good friend has a maple tree with these black spots on some of the leaves. Is this a serious condition that could lead to the loss of the tree? Can it be treated?

Hennepin County Minnesota

Expert Response

Check these web pages.
https://yardandgarden.extension.iastate.edu/encyclopedia/maple-tar-spot
https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/maple/leavesspots.html

Linda G Tenneson, Benton County Extension Master Gardener & Tree Care Advisor Replied June 16, 2026, 5:31 PM EDT

Our mission is to help Cooperative Extension generate a more visible, measurable, local act. We achieve this through our nationally funded programs made possible by member dollars and cooperative agreements with federal agencies, and through partnering on state, regional, and national initiatives with Cooperative Extension and the Extension Committee on Organization and Policy (ECOP). We serve all Land Grant Universities, regardless of membership status.

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.

Loading ...