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Diseased White Pines on my property #941262

Asked August 02, 2026, 8:38 AM EDT

My property in the Manistee National forest. I have 2 acre. 60 plus trees have turned total brown, aka, dead. this happened very fast. Many more have branches affected. White sap is running down trunk on several. I have already cut down 25 dead small trees

Muskegon County Michigan

Expert Response

Hello

With sap running down you might have a Boring insect or a disease affecting the white pine trees.

Here are some bulletins listing pests and diseases of white pine:

https://extension.umn.edu/lawns-and-landscapes-minnesota/white-pine-blister-rust

https://plantpathology.mgcafe.uky.edu/files/ppfs-or-w-22.pdf

It isn’t possible to completely diagnose from pictures here. Please reach out to your Conservation District, who may be able to assist you-

https://muskegoncd.org

Also contact a Forester in your area-

https://www.michigan.gov/mdard/environment/forestry/qualified-forester-registration/find-a-local-forester

You need an on-site evaluation and maintenance plan for your acreage. If you can’t get help through these resources, please let me know.

Thank you for your question! Laura S. Michigan State University Extension Advanced Master Gardener Volunteer You may also contact the toll free MSU Extension lawn and garden hotline at 1-888-678-3464 with your gardening questions or visit www.migarden.msu.edu for Smart Gardening resources. Replied August 02, 2026, 12:22 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.

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