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Homeowners Guide to EAB


The emerald ash borer (EAB) is a non-native insect of major concern that was discovered in Saint Paul in May, 2009. In recent years Michigan and other states have suffered widespread ash deaths numbering in the millions due to this insect.  The Saint Paul Forestry Unit is working collaboratively with local, state and federal agencies on efforts to mitigate the effects of this destructive pest.

The purpose of this guide is to inform Saint Paul residents of the various strategies available for ash tree management in response to emerald ash borer.  Infested ash trees left to die will over time become very brittle and pose a threat to the safety of the public. Homeowners should become familiar with management alternatives for ash and prepare for action. 


 How Do I Manage My Private Property Ash Tree?
Information courtesy: Minnesota Department of Agriculture
Minnesota Department of Natural Resources
University of Minnesota Extension
                                                                                                                                                                                                                                                                                                                                  STEP 1:
Determine if you have an ash tree
ash tree identification)
  STEP 2:
Determine if your tree has EAB
(EAB detection and identification)

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STEP 3:   STEP 3: 
  Consider the alternative management strategies for your private property ash tree
  • Removal of ash trees
  • Removal and replacement of ash tree
  • Plant an additional tree on your property prior to ash removal
  • Treatment of high-value ash trees
Order of strategies is not based on importance


Call the Saint Paul Forestry Unit at (651) 632-5129 to help determine if your tree is infested with EAB.  EAB infested trees, firewood, and stumps are considered nuisances and must be removed, as stated in Title XVII, Chapter 175A of the City of Saint Paul legislative code.
Considerations for ash treatment:
  • The City of Saint Paul employs insecticide as just one tool to assist in slowing the spread of EAB and as a means of response to a more manageable time and expense. Treatment of boulevard trees is not employed as a means of saving trees for the long term.
  • Soil drench and soil injection administered insecticides may be toxic to beneficial invertebrates, mammals, and fish.  Soil drenches and injections also have the potential to leach into surface water and ground water.  Trunk injected insecticides have fewer concerns for water quality. Refer to: Emerald Ash Borer: Homeowners Guide to Insecticide Selection, Use, and Environmental Protection for help in selecting a treatment option.
  • Compare the cost of treatment versus removal and replacement of tree with the Perdue University Emerald Ash Borer Cost Calculator
  • Tree care companies
  • Boulevard trees may be treated at the expense of the homeowner with approval from the Forestry Unit and a free permit.  Click Licensed Tree Care Companies for a list of City of Saint Paul licensed tree care contractors.
  • Insecticide Options for Protecting Ash Tree From Emerald Ash Borer   
Considerations for ash removal:
Considerations for ash replacement:
  • Select the right tree for the right place. Use the Tree Owners Manual to learn about the benefits of trees, the benefits of site selection, and how to plant and care for trees.
  • Saint Paul is located within zone 4a of the USDA Hardiness Zone map.  Select an appropriate tree for the Twin Cities area by viewing the University of Minnesota Extension's Recommended Trees for Southeast Minnesota: An Ecosystem Approach.
  • Discover the benefits of the urban forest of Saint Paul by viewing Saint Paul Trees; an exploration into the value of Saint Paul's most valuable piece of green infrastructure.                                                                                                                                                                                   

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