Knowledgebase

OAK Wilt? Otter Tale Lake, MN #873318

Asked June 16, 2024, 2:10 PM EDT

Would these photos be any help in identifying the underlying problem for abundant loss of green branches?

Otter Tail County Minnesota

Expert Response

Hi Maggie,

These look like some kind of gall created by insects. See this page:

https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/oak/branchesgrowths.html

There isn't a good way to control these galls except to remove any branches that have these galls in the winter. Trees can live many years with these galls.

https://hort.extension.wisc.edu/articles/deciduous-tree-galls/

https://forestrynews.blogs.govdelivery.com/2018/05/04/phomopsis-galls/

Hope this helps. Thanks.

MJ Replied June 17, 2024, 4:16 PM EDT

Loading ...