Emerald Ash Borer

The emerald ash borer (EAB), Agrilus planipennis, is an exotic insect pest from Asia. The flattened, creamy white larval stage feeds below the bark and cuts off the living, water and nutrient conducting vessels causing tree death. Adults are small elongated oval beetles that are metallic green in color. This insect colonizes the top of ash trees (Fraxinus species) first, then moves down the tree.

EAB has been found in several Iowa counties.  As of February 2014, all 99 counties in Iowa have been quarantined (Treatment Map) by the Iowa Department of Agriculture and Land Stewardship to slow the movement of this destructive pest to non-quarantined areas/states. A cooperative state and federal effort has developed the “Iowa Emerald Ash Borer Readiness Plan.” EAB has also been found in 24 other states, including Illinois, Minnesota, Missouri, and Wisconsin, on Iowa’s borders.”

ISU experts encourage Iowa homeowners to evaluate their ash tree’s health and value in the landscape, and their commitment to years of preventive treatments. If an ash tree is within 15 miles of a known EAB infestation, preventive treatments are suggested for individual trees. Check out all of the information (including some in Spanish) about this pest that threatens Iowa’s forests.

Direct link on YouTube https://www.youtube.com/playlist?list=PLpkEiJv9k6M2DgIXOgGzISV553AyuV3we

Upcoming Emerald Ash Borer Talks

Topic InformationDateTime
Topic: TBA
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TBA TBA

Emerald Ash Borer News Releases

Trying to find an News Release that was previously listed? Check on our Prior EAB News Release page.

  1. Emerald Ash Borer Confirmed in Decatur County, IA (November 9, 2017)
  2. Emerald Ash Borer Confirmed in Ringgold County, IA (July 27, 2017)
  3. Emerald Ash Borer Confirmed in Butler County, IA (June 29, 2017)
  4. Emerald Ash Borer Confirmed in Five More Iowa Counties (June 15, 2017)
  5. Emerald Ash Borer Found in Fayette and Madison Counties, IA (April 5, 2017)
  6. Emerald Ash Borer Found in Greene and Wayne Counties, IA (March 10, 2017)
  7. Emerald Ash Borer Discovered in Jackson and Clayton Counties, IA (February 14, 2017)
  8. Treat Trees in Early Spring to Prevent Emerald Ash Borer (January 9, 2017)

Webcasts About Emerald Ash Borer

  1. Preparing for Emerald Ash Borer (EAB) in Iowa (June 12, 2009)
  2. Preparation for the Emerald Ash Borer in Iowa (March 15, 2007)

Frequently Asked Questions

  1. Common Problems of Ash Trees (PDF)
  2. EAB Pest Alert (PDF)
  3. Frequently Asked Questions about EAB (Power Point)
  4. Frequently Asked Questions about EAB (PDF)
  5. Frequently Asked Questions about EAB-Greater Des Moines Area (Power Point)
  6. Frequently Asked Questions about EAB-Greater Des Moines Area (PDF)
  7. Frequently Asked Questions about USDA's Emerald Ash Borer Biocontrol Program (PDF)

Management of Emerald Ash Borer

  1. Emerald Ash Borer Management Options--PM 2084 (PDF)
  2. Emerald Ash Borer Management Options--PM 2084(S) (PDF) (Spanish Version)
  3. Protecting Bees from Pesticides--SP 0455 (PDF)
  4. Finding a Certified Pesticide Applicator for Emerald Ash Borer Treatment --PM 3074 (PDF)
  5. Consulting Arborists Provide Service in Iowa--FOR 366B (PDF)
  6. 2015 Treatment Options for EAB (Power Point)
  7. Emerald Ash Borer Insecticides: Label Guidance for Use Limits (PDF)
  8. Potential Side Effects of EAB Insecticides FAQ (PDF)
  9. 2014 Multistate Insecticide Options for Protecting Ash Trees from EAB (PDF)
  10. USDA Biological Control Plan

Community Preparation

  1. Suggestions for Emerald Ash Borer Community Preparation

Ash Identification and Replacement Suggestions

  1. Ash Tree Identification (PDF)
  2. Shade Trees for Iowa - Ash Alternatives--FOR 406 (PDF)
  3. Small-stature Trees for Iowa - Ash Alternatives--FOR 405 (PDF)
  4. Alternatives to Ash…Shade Trees for the Iowa Landscape (Power Point)

Visual Aids for Emerald Ash Borer Identification

  1. EAB Image Gallery
  2. Signs and Symptoms of EAB
  3. EAB or Native Borer? (PDF)
  4. EAB Diagnostic Aid (PDF)
  5. Illinois EAB Screening Sheet (PDF)
  6. Minnesota EAB Screening Sheet (PDF)
  7. EAB Look Alikes (Power Point)
  8. EAB Look Alikes (Slide Script)
  9. Don't be Fooled by Look Alikes!
  10. Native Borers and EAB Look Alikes

Other Websites

  1. National EAB Website
  2. Iowa Tree Pests Website
  3. Iowa DNR EAB Website

Emerald Ash Borer Submission Information

  1. EAB Sample Submission Form (Word)
  2. EAB Sample Submission Form (PDF)
  3. EAB Diagnostic Aid (PDF)

Emerald Ash Borer Information in Spanish

  1. Emerald Ash Borer Management Options--PM 2084(S) (PDF) (Spanish Version)
  2. Purdue's Web site
  3. EAB Pest Alert
  4. EAB Power Point Slides

Contact information:
Mark Shour
Extension Program Specialist
10 Insectary Building
Iowa State University
Ames, IA 50011
(515) 294-5963

Page last updated: February 1, 2018