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Emerald Ash Borer Field Guide
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EAB larvae Agrilus planipennis
3-4 mm EAB gallery and exit hole (1/18 inch)
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Signs of EAB attack in bark1/18 inch exit hole
EAB adult (1/2 inch) and
gallery Look for adults – May through July
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Male EAB
Adult EAB, 1/2 inch
NOT an emerald ash borer
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D-shaped exit holes, 1/18 inch
Look closely for the d-shaped exit hole,
1/18 inch
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Typical crack at infested region of
bole
Canker formed from EAB infestation. Note WINDING galleries
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Sprouts beneath infested area of bole
Epicormic branching associated with infested tree
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Possible EAB symptoms -later stage of infestation
Possible early symptoms of EAB attack
Dying branches possibly associated with infested
ash
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Woodpeckers may be a sign of EAB or other borer or bark beetle infestation
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Ash leaves, compound and opposite
Healthy ash trees
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White ash Fraxinus americana
Compound and opposite
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Green ash Fraxinus
pennyslvanica Compound
and opposite
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Ash yellows
Stem canker caused by Cytospora pruinosa
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Banded Ash Clearwing
Podosesia aureocincta
Larvae exude strands of woody frass from 1/8 inch holes in the trunk. Frass can often be found piled at the base of infested trees.
Banded ash borer Neoclytus caprea
Round exit holes. Larval galleries packed with frass.
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Redheaded Ash Borer, Neoclytus
acuminatus
Look for sap spots with fine boring dust –early attack Later, frass is discharged from entrance holes, Exit holes are round
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Ash/Lilac Borer (trunk borer),Podosesia syringae
Adults are clearwing moths that mimic paper
wasps in appearance and
flight
Circular exit holes often with pupal skins protruding
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Eastern ash bark beetleHylesinus aculeatus
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Mining can only be seen under the bark
Ash cambium minerPhytobia spp.
Photos obtained from the following sources: Michigan State University http://www.forestryimages.org Michigan Department of Agriculture University of Georgia University of Illinois University of Nebraska
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