What constitutes a tree diseased with oak wilt or Dutch elm disease?

An oak or elm with one of these diseases show signs in June-September during leaf-on conditions. The fungal pathogen is spread by shared root systems between “like” species of trees and by a beetle. The tree reacts to the fungus and tries to limit its spread by blocking up the water-conducting tissues, The first symptom often looks like drought injury and is usually “flagging” of one or more branches in the upper part of the canopy. Flagging looks like yellow or brown curling leaves moving from the branch tips down toward the main stem. The leaves may also start curling with a dark water-stained olive-green color. As the disease progresses, leaves drop. It is easy to peel back the bark on diseased branches to reveal staining on the living tissue, adding another positive identification to the presence of the fungus.

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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?