Yellow Bumps on Oak Leaves - Ask Extension
What are the yellow bumps on the leaves of my oak tree? The tree is very, very large. What treatment is necessary, if any?
Knowledgebase
Yellow Bumps on Oak Leaves #873763
Asked June 19, 2024, 11:50 AM EDT
What are the yellow bumps on the leaves of my oak tree? The tree is very, very large. What treatment is necessary, if any?
Washtenaw County Michigan
Expert Response
Good Afternoon,
Looks like Jumping Oak Gall. Oak leaf galls do not cause serious injury to the tree and Michigan State University Extension does not recommend attempting to control leaf gall makers with insecticides. Oak trees and gall makers have been getting along together for thousands of years. Insecticides should only be employed when the health of the tree is threatened.
Jumping oak gall causing damage to white oak - Landscaping (msu.edu)
Jumping Oak Gall is jumping all over St. Louis! - Metropolitan Forestry Services, Inc. (metro-forestry.com)
I hope this helps. Thanks for using our service.
Looks like Jumping Oak Gall. Oak leaf galls do not cause serious injury to the tree and Michigan State University Extension does not recommend attempting to control leaf gall makers with insecticides. Oak trees and gall makers have been getting along together for thousands of years. Insecticides should only be employed when the health of the tree is threatened.
Jumping oak gall causing damage to white oak - Landscaping (msu.edu)
Jumping Oak Gall is jumping all over St. Louis! - Metropolitan Forestry Services, Inc. (metro-forestry.com)
I hope this helps. Thanks for using our service.
