How can I tell if my tree has EAB?

The primary symptoms of EAB are woodpecker activity, bark splits, crown dieback and suckering shoots. If you would like additional information and pictures to help with identifying these symptoms, go to our EAB Signs and Symptoms webpage. If you see any of these symptoms and would like to confirm if your tree has EAB, contact Forestry staff at

An infested ash tree has bark splits with visible larval galleries and/or significant woodpecker activity due to the presence of EAB. City Forestry staff often use binoculars to see galleries high in the tree and can help point out the signs they used to identify the tree as EAB positive. This is one of the reasons leaf-off conditions are best for seeing EAB damage on the tree.

If we see a tree that appears early in the infestation, we will leave a door hanger alerting the property owner about the City’s Ash Injection Program in order to encourage therapeutic injection to preserve the tree and its canopy benefits.

Show All Answers

1. What is a certified arborist?
2. What should I ask for when I am hiring an arborist or tree company?
3. What is a Minnesota Certified Tree Inspector?
4. What happens when a tree is infested with emerald ash borer (EAB) , or diseased with oak wilt and/or Dutch elm disease and is marked for removal?
5. Where is EAB in Lakeville?
6. How can I tell if my tree has EAB?
7. What are the removal requirements for an infested ash tree?
8. What If I don’t think I can remove my infested/diseased tree or properly dispose of the wood within the required timeline?
9. How do I dispose of the wood?
10. Does the stump have to be ground out and removed?
11. Should I notify the City when we finish control treatments and tree removal?
12. Does the City of Lakeville offer replacement trees for removed ash trees?
13. What can I do to save my other ash trees?
14. How do I know if my property has been re-inspected and meets the insect/disease control guidelines?
15. What constitutes a tree diseased with oak wilt or Dutch elm disease?
16. Are there things I can do to protect my elms from Dutch elm disease?
17. What can I do to protect my oaks from oak wilt?
18. What does DBH mean? What factors influence how much a tree will cost to remove?
19. How did the tree inspector determine property lines, and what if I don’t think the tree is on my property?
20. What if there are power lines over my tree?
21. Does the City mark infested and diseased trees on its own property?