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.

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 Meeting
Presenters: Joe Schwartz, Iowa Department of Natural Resources; Mike Kintner, Iowa Department of Agriculture and Land Stewardship; Mark Shour, ISUEO
Location: Northwest Community College, 603 West Park Street (Room 304 Building C), Sheldon, Iowa
Host: Margaret Murphy, ISUEO Lyons County
Email: mmurphy@iastate.edu Phone Number: (712) 472-2576
03/30/15 6:30 PM

Topic: Emerald Ash Borer Public Meeting
Presenters: Matt Brewer, Iowa Department of Natural Resources; Mike Kintner, Iowa Department of Agriculture and Land Stewardship; and Mark Shour, Iowa State University Extension & Outreach Entomologist
Location: Ossian Community Center, 123 West Main St, Ossian, IA
Host: Shane Donegan
Email: Shane.Donegan@dnr.iowa.gov Phone Number: (515) 725-8219

04/16/14 6:30 PM
Topic: Community Tree Planning Workshop
Presenters: Brad Riphagen, Trees Forever; Mark Shour, Iowa State University Extension & Outreach Entomologist; an Iowa DNR District Forester
Location: Sac County Conservation Center - 2970 280th Street, Sac City, IA
Host: Ainsley Brungardt, Regional Planner, Region XII Council of Governments
Email: abrungardt@region12cog.org Phone Number: (712) 792-9914
04/28/15 9:00 AM
Topic: Community Tree Planning Workshop
Presenters: Brad Riphagen, Trees Forever; Mark Shour, Iowa State University Extension & Outreach Entomologist; an Iowa DNR District Forester
Location: Yellowsmoke Park Lookout Shelter-2237 Yellowsmoke Road, Denison, IA
Host: Ainsley Brungardt, Regional Planner, Region XII Council of Governments
Email: abrungardt@region12cog.org Phone Number: (712) 792-9914
04/28/15 1:30 PM
Topic: Community Tree Planning Workshop
Presenters: Brad Riphagen, Trees Forever; Mark Shour, Iowa State University Extension & Outreach Entomologist; an Iowa DNR District Forester
Location: Audubon Economic Development Center-800 Market Street, Audubon, IA
Host: Ainsley Brungardt, Regional Planner, Region XII Council of Governments
Email: abrungardt@region12cog.org Phone Number: (712) 792-9914
05/26/15 9:00 AM
Topic: Community Tree Planning Workshop
Presenters: Brad Riphagen, Trees Forever; Mark Shour, Iowa State University Extension & Outreach Entomologist; an Iowa DNR District Forester
Location: Swan Lake Conservation Education Center – 22676 Swan Lake Drive, Carroll, IA
Host: Ainsley Brungardt, Regional Planner, Region XII Council of Governments
Email: abrungardt@region12cog.org Phone Number: (712) 792-9914
05/26/15 1:30 PM

Emerald Ash Borer News Releases

  1. Emerald Ash Borer Confirmed in Clinton County, IA (March 25, 2015)
  2. Emerald Ash Borer Confirmed in Keokuk County, IA (January 30, 2015)
  3. Emerald Ash Borer Confirmed Five Counties in Southern Iowa (December 15, 2014)
  4. Emerald Ash Borer Confirmed in Story County, Iowa (August 25, 2014)
  5. Emerald Ash Borer Confirmed in Boone County, Iowa (August 4, 2014)
  6. Emerald Ash Borer Confirmed in Muscatine County, Iowa (July 21, 2014)
  7. Emerald Ash Borer Found in Henry County, Iowa (July 11, 2014)
  8. Emerald Ash Borer Found in Johnson County, Iowa (June 13, 2014)
  9. Emerald Ash Borer Confirmed in Jasper County, Iowa (March 28, 2014)
  10. Emerald Ash Borer Confirmed in Bremer and Wapello Counties, Iowa (Februray 19, 2014)
  11. Emerald Ash Borer Confirmed in Black Hawk County, Iowa (Februray 3, 2014)
  12. Emerald Ash Borer Confirmed in Union County, Iowa (December 19, 2013)
  13. Quarantine of Firewood and Ash Products Established for 25 Counties in Eastern Iowa (November 1, 2013)
  14. Emerald Ash Borer Confirmed in Cedar County, Iowa (October 3, 2013)
  15. Emerald Ash Borer Confirmed in Des Moines County, Iowa (August 1, 2013)
  16. Emerald Ash Borer Confirmed in Jefferson County, Iowa (July 16, 2013)
  17. 2012 Emerald Ash Borer Surveillance Summary (January 17, 2013)
  18. Very Limited EAB Movement in Iowa Found (September 11, 2012)
  19. New Firewood Rule in Iowa (January 1, 2011)
  20. Quarantine of Allamakee County Established to help Prevent Spread of EAB (June 14, 2010)
  21. EAB Team News Release (May 14, 2010)
  22. Video Highlights: EAB Management Options
  23. 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)

Management of Emerald Ash Borer

  1. Emerald Ash Borer Management Options--PM 2084 (PDF)
  2. Protecting Bees from Pesticides--SP 0455 (PDF)
  3. Finding a Certified Pesticide Applicator (PDF)
  4. 2015 Treatment Options for EAB (Power Point)
  5. Emerald Ash Borer Insecticides: Label Guidance for Use Limits (PDF)
  6. Potential Side Effects of EAB Insecticides FAQ (PDF)
  7. 2014 Multistate Insecticide Options for Protecting Ash Trees from EAB (PDF)
  8. 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. 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. 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: March 25, 2015