Frequently Asked Questions: EAB in Iowa April 2015
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1. What is the Emerald ash borer? Small insects long x 1/8
wide
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Larval feeding slowly kills the tree because it cant circulate
nutrients
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2. What does EAB eat?
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Green ashGreen ash White ashWhite ash Black ashBlack ash Blue
ashBlue ash Pumpkin ashPumpkin ash
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Common ash selections White Ash Autumn ApplauseAutumn Applause
Autumn PurpleAutumn Purple Northern BlazeNorthern Blaze
RosehillRosehill Skyline Skyline Windy CityWindy City Green Ash
Bergeson Cimmaron Marshall Seedless Patmore Prairie Spire
Summit
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White fringetree, Chionanthus virginicus (Ohio, Oct. 15,
2014)
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20+ species including F. chinensis F. mandshurica 3. Where is
EAB from?
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EAB likely introduced in the 1990s on wood packaging material
originating from Asia
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4. How did it get to Iowa?
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People move EAB
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5. Should I be concerned about EAB?
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Tree mortality is essentially complete
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Placeholder Slide
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6. How do I know I have an ash tree? Two sources to check on
tree identification:
https://store.extension.iastate.edu/ItemDetail.aspx?ProductID=1482
www.extension.iastate.edu/forestry/iowa_trees/tree_id.html Common
Problems of Ash Trees
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Green ashWhite ash
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7. How do I know if my ash tree is infested? Thinning crown,
dying branches
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Epicormic growth, water sprouts, suckers 7. How do I know if my
tree is infested?
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Adult feeding notches margins of leaflets D. McCullough,
Michigan State
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Woodpecker activity 7. How do I know if my tree is
infested?
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Woodpecker activity
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7. How do I know if my tree is infested? D-shaped exit hole
S-shaped larval feeding
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8. For counties not yet known to have EAB, who can help me
determine if my ash tree is infested? State Entomologist:
515-725-1465 Iowa DNR Forestry: 515-725-8453 ISU Extension:
515-294-1101
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9. Who should be thinking about treating ash trees? Within 15
miles of a known infestation and the ash tree is healthy Outside 15
miles treatment may be premature
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10. EAB Management Options PM 2084
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EAB chemical control (continued) Healthy, vigorously growing,
and valuable to your landscape Must be done yearly for the life of
tree One active ingredient (emamectin benzoate) is injected every
other year Preventive treatments most effective; curative may work
if less than 30% dieback of the canopy
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EAB chemical control (continued) withinAsh trees within 15
miles of confirmed EAB site are at risk of EAB attack; preventive
treatments suggested within this risk zone Based on recommendations
from EAB researchers at Michigan State University and Ohio State
University
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EAB chemical control (continued) Systemic insecticides require
time and active tree growth prior to adult EAB activity:
soil-injections 4-8 weeks trunk injections 2-4 weeks Spring
application shown to be most effective for most preventive
products
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EAB chemical control (continued) Homeowner treatments for ash
trees up to 60 circumference (20dbh) for soil treatments Granular
applications for ash trees up to 36 circumference (12dbh) Homeowner
applications once/year Larger trees should be treated by certified
pesticide applicator
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Canopy sprays not recommended Limited effectiveness Equipment
needs Spray drift likely Possible adverse effects to
nontargets
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11. Pesticide sales offers? For spring treatments, if you live
within 15 miles of a confirmed EAB infested site, get estimate for
the treatment. Obtain an additional estimate before any work is
done If you live outside the risk zone, thank them for their
interest and keep their information on file
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2014: Appanoose Co. Boone Co. Black Hawk Co. Bremer Co. Jasper
Co. Henry Co. Lucas Co. Mahaska Co. Marion Co. Monroe Co. Muscatine
Co. Story Co. Wapello Co. 2013: Des Moines Co. Jefferson Co. Cedar
Co. Union Co. 2010: Allamakee Co. 2015: Clinton Co. Dallas Co.
Keokuk Co. 12. Where has EAB been found in Iowa?
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13. EAB response plan? http://www.extension.iastate.edu/pme/
EmeraldAshBorer.html Or just Google ISU PSEP EAB
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14. What does EAB quarantine mean? Stop movement of infested
ash materials (logs, trees, firewood, wood chips) IDALS and USDA
APHIS works with commercial wood products industries to comply with
quarantine
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15. How many counties in Iowa have been quarantined? As of
February 4, 2014, the Iowa Department of Agriculture and Land
Stewardship quarantined all 99 counties in Iowa for emerald ash
borer
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16. Disposal of infested ash wood? Iowa residents are asked to
use or dispose of EAB infested wood within their county Contact
your local government or county extension office if you have
questions
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17. General recommendations for communities? Iowa Department of
Natural Resources Forestry Bureau Tivon Feeley (Forest Health)
515-725-8453 Emma Hanigan (Urban Forester) 515-725-8201
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18. Current EAB information? National EAB Web site:
www.emeraldashborer.info www.emeraldashborer.info ISUEs Web site:
http://www.extension.iastate.edu/ psep/EmeraldAshBorer.html
http://www.extension.iastate.edu/ psep/EmeraldAshBorer.html
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19. Who is a local contact? Your County Extension office!
