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Treat maple gall mites? #872611

Asked June 11, 2024, 12:38 PM EDT

My young silver maple has serious gall mites on its leaves. Should I treat it? Will the galls kill the tree? How do I keep it from spreading to other young trees?

Cook County Minnesota

Expert Response

Thank you for writing.
These are more of a cosmetic problem than plant damaging.
Here is good information for you. https://hort.extension.wisc.edu/articles/maple-gall-mites-eriophyidae/#:~:text=Because%20the%20mites%20overwinter%20on,applied%20prior%20to%20bud%20break.

Steve Miles, Master Gardener, Hennepin County, (I am a volunteer human being: not a bot, not AI). I'm an avid gardener but not a degreed or certified horticulturist or arborist. I will do much better if you also send a photograph. I like follow-up questions. The University' garden soil tests are excellent. https://soiltest.cfans.umn.edu/testing-services/lawn-garden This is how to find a tree expert. https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional A Directory of ISA certified arborists is at https://certificates.directory.isa-arbor.com/ The Minnesota Landscape Arboretum is a wonderful place to see and learn about plants that grow in Minnesota. https://mngardens.horticulture.umn.edu/minnesota-landscape-arboretum Ask a Master Gardener is a public service of the University of MInnesota's Extension Division. Please donate if we make you happy. https://give.umn.edu/gardener Replied June 11, 2024, 2:57 PM EDT

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