What’s happening to our Northern Pin Oak ? - Ask Extension
Please tell me what to do with the dead, curling leaves and spots on leaves?
Knowledgebase
What’s happening to our Northern Pin Oak ? #877669
Asked July 17, 2024, 3:56 PM EDT
Please tell me what to do with the dead, curling leaves and spots on leaves?
Anoka County Minnesota
Expert Response
Based upon what we can see in the photos, two things appear to be affecting the leaves: oak leaf blister, a fungal disease, and oak leaf galls caused by a kind of midge.
Learn more here:
https://ag.umass.edu/landscape/fact-sheets/oak-leaf-blister
http://blog.minnesotaseasons.com/?p=720
Neither of these usually affect the health of trees and no control is needed.
https://extension.umn.edu/yard-and-garden-insects/insect-and-mite-galls
Learn more here:
https://ag.umass.edu/landscape/fact-sheets/oak-leaf-blister
http://blog.minnesotaseasons.com/?p=720
Neither of these usually affect the health of trees and no control is needed.
https://extension.umn.edu/yard-and-garden-insects/insect-and-mite-galls
Thank you for the fast, informative reply.
Judy Jung
Sent from my iPhone
Sent from my iPhone
On Jul 17, 2024, at 4:38 PM, Ask Extension <<personal data hidden>> wrote:
Thank you for the excellent photos. We often don't get photos with the detail needed to ID plants or animals or to diagnose problems.
