Tree Health Information

Are leaves falling off your tree in the middle of summer? Is the foliage of the tree off-color or different than it was last year? Are there strange bumps or ragged edges on the tree leaves? Have you noticed an increase in insects or caterpillars on your tree?

Eden Prairie is committed in efforts to reduce tree losses through management of pests and diseases. Not all pests and diseases require aggressive sanitation to help control spread to other trees, but those such as Dutch elm disease (DED), oak wilt and emerald ash borer (EAB) do. Currently the City operates sanitation programs for all three.

City Tree Inspections

City tree inspectors inspect trees on public and private property, sometimes requiring removal of trees to prevent the spread of disease and infestation. City code (Section 9.70) allows inspectors to enter private property to further inspect suspect diseased/infested trees and require removal if positively identified.

If a tree on private property is identified as a nuisance tree, it is marked with paint and the property owner is notified in writing. The debris from trees required to be removed often qualify for free hauling and disposal from the City (criteria to qualify is outlined in written notice).

Diagnosing Dutch Elm Disease, Emerald Ash Borer and Oak Wilt

Symptoms of DED and oak wilt are similar due to both being diseases which affect the trees vascular system. Tree inspectors first look for wilted leaves or branches. If those are identified, inspectors take a twig sample and peel back the bark to confirm the disease. On a healthy elm/oak the underlying wood is white. If DED or oak wilt is present, the underlying wood has distinctive dark streaking. If this method is used and there is still question of disease presence, samples are sent to a lab for testing.

If you are concerned about the health of your tree, please call the forestry technician at 952-949-8463.

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