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: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Hamilton County Conservation Office (Located at 2490 Briggs Woods Trail – just south of Webster City in Briggs Woods County Park)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.nett Phone Number: (515) 576-7183, ext. 211
10/30/14 9:00 AM
Topic: EAB Pulblic Meeting
Presenters: Emma Hanigan, IDNR Urban Forester; Mike Kintner, IDALS; Mark Shour, Iowa State University Extension & Outreach Entomologist
Location: Henry County Extension Office (Located at 127 N. Main in the city of Mt. Pleasant)
Host: Darbee Wellman, Agriculture & Natural Resources Feild Specialist, Henry County
Email: dwellman@iastate.edu Phone Number: (319) 835-5116
11/1314 6:30 PM
Topic: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Oxbow Lodge (Located at 7 Park RD in Oxbow Park on the western edge of the City of Humboldt across from the golf course)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.net Phone Number: (515) 576-7183, ext. 211
11/18/14 1:30 PM
Topic: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Bob Heun Shelter House (Located at 1415 Nelson Ave - just north of Fort Dodge in Kennedy Park)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.net Phone Number: (515) 576-7183, ext. 211
01/22/15 1:30 PM
Topic: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Pocahontas County Nature Center (Located at 702 NW 7th St. near the Hospital in the City of Pocahontas)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.net Phone Number: (515) 576-7183, ext. 211
02/17/15 9:00 AM
Topic: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Webster County Extension Office (Located at 210 1st St. SW in a white building across from the Water Tower on 1st St. SW in the City of Clarion)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.net Phone Number: (515) 576-7183, ext. 211
03/05/15 9:00 AM
Topic: EAB Community Tree Planning Workshop
Presenters: Meredith Borchardt, Field Coordinator, Trees Forever; Joe Herring, District Forester, Iowa DNR; Mark Shour, Iowa State University Extension & Outreach Entomologist; Maggie Carlin, Regional Planner, MIDAS Council of Governments
Location: Rockwell City Library/Community Center (Located at 424 Main St. in a newer brick building just north of the County Courthouse in the City of Rockwell City)
Host: Cliff Weldon, MIDAS Council of Governments
Email: cweldon@midascog.net Phone Number: (515) 576-7183, ext. 211
03/24/15 1:30 PM

Emerald Ash Borer News Releases

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