Emerald Ash Borer and Other Tree Pests
Top 5 things to know about Emerald Ash Borer (EAB) in Boulder
- EAB is a non-native beetle that has killed hundreds of millions of North American ash trees. More than 70,000 ash in Boulder and 1.45 million ash in metro Denver are at risk.
- Pesticide options are available to protect trees, but EAB is fatal if ash are not treated.
- Boulder Forestry is treating approximately 1,300 public street and park ash trees and is removing and replacing remaining ash trees with a diverse mix of non-ash species.
- Most ash are on private property however, so homeowners need to act now!
- YOU can help! Find out what you can do to keep Boulder's tree canopy resilient and diverse.
Are you treating or planning to treat a public ash tree? Let us know!
Is there a public ash tree near you?
Enter your address to find out if you have a public ash tree near you. This map shows only Public Ash trees.
= Untreated Public Ash Trees
= Treated Ash Trees
More information on urban forest pests
- Asian Longhorn Beetle (PDF)
- Douglas-fir Tussock Moth
- Ips Beetle
- Japanese beetle
- Mountain Pine Beetle
- Pine Wilt Nematode
- Thousand Cankers Disease