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 9 Iowa counties (Allamakee, Black Hawk, Bremer, Cedar, Des Moines, Jasper, Jefferson, Union, and Wapello).  As of February 2014, all 99 counties in Iowa have been quarantined (Quarantine 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 21 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.

Adult Emerald Ash Borer EAB Larval Tunnel

Emerald Ash Borer with wings raised (left) & S-Shaped gallery of EAB Larva (right)

Upcoming Emerald Ash Borer Talks

Topic InformationDateTime
Topic: Emerald Ash Borer Update (City Workers, Arborists, and Commercial Applicators)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; and Mike Kintner (IDALS)
Location: Waverly Civic Center, 200 First Street NE, Waverly, IA 50677
Host: Ron Lenth Phone Number: 319-882-4275
04/17/14 3:00 PM
Topic: Emerald Ash Borer Update (Public Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; and Mike Kintner (IDALS)
Location: Waverly Civic Center, 200 First Street NE, Waverly, IA 50677
Host: Ron Lenth Phone Number: 319-882-4275
04/17/14 6:30 PM
Topic: Emerald Ash Borer Update (EARTH DAY/ARBOR DAY EVENT)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist and Mike Kintner (IDALS)
Location: Grimes Farm and Conservation Center, 2349 233rd Street, Marshalltown, IA 50158
Host: Diane Hall Email: dhall@co.marshall.ia.us
04/26/14 2:30-4:30 PM
Topic: Emerald Ash Borer Informational Meeting (Municipal Employees Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; Mike Kintner (IDALS); and George Warford (Iowa DNR District Forester)
Location: Greene County Extension, Jefferson, IA
Host: Michael Cooley Phone Number: 515-386-2138
04/28/14 1:00-3:30 PM
Topic: Emerald Ash Borer Informational Meeting (Public Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; Mike Kintner (IDALS); and George Warford (Iowa DNR District Forester)
Location: Greene County Extension, Jefferson, IA
Host: Michael Cooley Phone Number: 515-386-2138
04/28/14 6:30-8:00 PM
Topic: Emerald Ash Borer Update (Green Industry Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; Mike Kintner (IDALS); and Mark Vitosh (Iowa DNR District Forester)
Location: Johnson County Extension Office, 3109 Old Highway 218S, Iowa City, IA
Host: Gene Mohling Email: mohling@iastate.edu
04/29/14 1:30-3:30 PM
Topic: Emerald Ash Borer Update (Public Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; Mike Kintner (IDALS); and Mark Vitosh (Iowa DNR District Forester)
Location: Montgomery Hall, Johnson County Fairgrounds , 3109 Old Highway 218S, Iowa City, IA
Host: Gene Mohling Email: mohling@iastate.edu
04/29/14 6:30-8:00 PM
Topic: Emerald Ash Borer: It's here. Now What? (Green Industry & Public Meeting)
Presenters: Mark Shour, Iowa State University Extension & Outreach Entomologist; Mike Kintner (IDALS); and David Bridges (Department of Natural Resources Forester)
Location: Youth Development Center, 800 North Maple Street, Monticello (fairgrounds)
Host: Jones County Extension and Outreach Phone Number: 319-465-3224
05/08/14 1:30-3:30 PM

Emerald Ash Borer News Releases

  1. Emerald Ash Borer Confirmed in Jasper County, Iowa (March 28, 2014)
  2. Emerald Ash Borer Confirmed in Bremer and Wapello Counties, Iowa (Februray 19, 2014)
  3. Emerald Ash Borer Confirmed in Black Hawk County, Iowa (Februray 3, 2014)
  4. Emerald Ash Borer Confirmed in Union County, Iowa (December 19, 2013)
  5. Quarantine of Firewood and Ash Products Established for 25 Counties in Eastern Iowa (November 1, 2013)
  6. Emerald Ash Borer Confirmed in Cedar County, Iowa (October 3, 2013)
  7. Emerald Ash Borer Confirmed in Des Moines County, Iowa (August 1, 2013)
  8. Emerald Ash Borer Confirmed in Jefferson County, Iowa (July 16, 2013)
  9. 2012 Emerald Ash Borer Surveillance Summary (January 17, 2013)
  10. Very Limited EAB Movement in Iowa Found (September 11, 2012)
  11. New Firewood Rule in Iowa (January 1, 2011)
  12. Quarantine of Allamakee County Established to help Prevent Spread of EAB (June 14, 2010)
  13. EAB Team News Release (May 14, 2010)
  14. Video Highlights: EAB Management Options
  15. Iowa State University Extension EAB News Release (May 14, 2010)

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-Waterloo (PDF)

Management of Emerald Ash Borer

  1. Emerald Ash Borer Management Options--PM 2084 (PDF)
  2. 2013 Treatment Options for EAB (Power Point)
  3. Emerald Ash Borer Insecticides: Label Guidance for Use Limits (PDF)
  4. Potential Side Effects of EAB Insecticides FAQ (PDF)
  5. 2009 Multistate Insecticide Options for Protecting Ash Trees from EAB (PDF)
  6. 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. Ash Alternate Shade Trees 2013(PDF)
  3. Ash Alternate Small-Stature Trees 2013(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. Illinois EAB Screening Sheet (PDF)
  4. Minnesota EAB Screening Sheet (PDF)
  5. EAB Look Alikes (Power Point)
  6. EAB Look Alikes (Slide Script)
  7. Don't be Fooled by Look Alikes!
  8. 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. Purdue's Web site
  2. EAB Pest Alert
  3. 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: April 14, 2014