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Get Help Making Ash Tree Choices

It's time for homeowners, park districts, and municipalities to make decisions about treating or removing ash trees as the emerald ash borer continues its advance through our streets, yards, and parks. The tiny green insect is ravaging millions of trees in the Chicago area. This invasive pest is so aggressive that virtually all native ash trees are at risk, experts say, and trees may die within two to four years after they become infested unless they are treated with insecticides or removed. Ashes are among the most common trees in yards, parks, and parkways.

There is no cure once a tree is infested, Arboretum experts say, but there are insecticide treatments that can slow or prevent infestation if a tree is not too damaged. If you want to save your tree you must act now. The Arboretum has a new brochure, “Your Ash Tree & EAB,” that can help homeowners understand the borer invasion and make decisions about whether to try to save their trees. Find it on the Plant Advice page of the Arboretum’s Web site.

For municipalities, park districts, and those concerned with an entire community’s trees, the Arboretum’s Community Trees Program has created a more detailed in-depth guide, “Emerald Ash Borer & Your Community.”

Many questions about the EAB infestations are answered in a podcast on which Andrea Dierich, Forest Pest Outreach and Survey Project Coordinator at The Morton Arboretum, explains about the origins and life cycle of this insect and how it destroys ash trees. Where did the emerald ash borer come from? How has the EAB become so destructive so quickly? How does it kill? LEARN MORE