Emerald Ash Borer Update

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Emerald Ash Borer Update

• September 2006

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Is It An Ash?
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Is It an Ash Tree?

• Compound leaves that are arranged opposite
  on the stems.
• Leaves are odd-pinnately compound.
• Plants in the genus Fraxinus.

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Is It an Ash Tree?
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Is It an Ash Tree?
Green ash leaf scar is D-shaped, with bud above
the scar.
Blue ash buds square stem.
White ash leaf scar is horseshoe-shaped and the
bud sits in the leaf scar.
Black ash has black buds.
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White Ash Fraxinus americana

• Cultivars of White Ash
• Autumn Applause (M)
• Autumn Purple (M)
• Rosehill (M)
• Skyline

At maturity Height 50-80
feet Leaves 5-9 leaflets, with entire margins or
some slight serration.
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Green Ash Fraxinus pennsylvanica
Green ash leaf scar is D-shaped, with bud above
the scar.

• Cultivars of green ash
• Cimmaron
• Emerald
• Marshalls Seedless (M)
• Patmore (M)
• Summit

At maturity Height 60
feet Leaves 5-9 leaflets with serrated margins
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Black Ash Fraxinus nigra
Blue Ash Fraxinus quadrangulata
Black ash has black buds. Not a common
ornamental.
Blue ash buds square stem. More common in
western Ohio. One cultivar True Blue.
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European Mountainash

• Alternate buds and branching.
• Odd-pinnately compound leaf, 9-15 leaflets.
• This plant is Sorbus aucuparia and is not
  in the Fraxinus genus.

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Boxelder or Ash-leaf Maple
Leaf scars encircle twig and meet at a sharp
angle buds red or green and pubescent.
Leaves with 3 to 5 leaflets coarsely serrate,
sometimes with a lobed terminal leaflet.
Paul Wray, Iowa State University
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Emerald Ash Borer _______________________
_________ Where Did It Come From?
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Emerald Ash Borer in North America

• Native to East Asia N.E. China, E. Siberia,
  Korea and Japan.
• Discovered in southeast Michigan in June 2002
  probably had been established at least 15 years.
• We dont know for sure,
  but emerald ash
  borer
  probably arrived in the
  U.S. in infested wood
  
  pallets, crating or
  dunnage.

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Emerald Ash Borer Life Stages and Life Cycle
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Order Coleoptera
Family Buprestidae
Metallic Wood-boring
Beetles/Flatheaded Borers
Emerald ash borer larvae 2nd, 3rd
and 4th instar
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• EAB Adult Beetle
• 3/8 to 1/2 long.
• Slender, elongate, with a flat back.
• Metallic, bright green, subtle bronze undertones.

Adult, ventral view
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EAB Larvae Creamy-white color. Legless. Head
and body flat- tened a flat-headed
borer. Segments are distinct and somewhat
bell- shaped resembles a small
tapeworm.
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Diagnosis Identifying Signs and
Symptoms EAB
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Diagnosing Emerald Ash Borer
Flat, tapeworm-like larvae with bell-shaped
segments