Emerald Ash Borer

Minnesota First Detectors

Emerald Ash Borer

Minnesota First Detectors David Cappaert, MSU

Marianne Prue, Ohio DNR

Marianne Prue, Ohio DNR

Dan Herrms, OSU

David Cappaert, MSU

Houping Liu, MSU

EAB Life Cycle

Minnesota First Detectors

EAB Lifecycle

David Cappaert, MSU

EAB Life Cycle

Minnesota First Detectors

EAB LifecycleEAB Life Cycle

Minnesota First Detectors

EAB LifecycleEAB Life Cycle

Minnesota First Detectors

EAB Lifecycle

David Cappaert, MSU

EAB Life Cycle

Minnesota First Detectors

How Does EAB Kill Trees?

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EAB Distribution

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EAB Distribution

Minnesota First Detectors

EAB Distribution

St Paul 1St Paul 2

Shoreview

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EAB Distribution

Victory / Houston

Winona

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EAB Status

0 2 4 6 8 10 12

Years Since Introduction

% Tree Mortality

EAB Population Size

This is a hypothetical example of how EAB population

increase and resulting tree mortality may occur.

Minnesota First Detectors

EAB Status

0 2 4 6 8 10 12

Years Since Introduction

% Tree Mortality

EAB Population Size

St Paul 1Winona

Shore-view

St Paul 2Houston

This is a hypothetical example of how EAB population

increase and resulting tree mortality may occur.

Minnesota First Detectors

Recognizing EAB Infested Trees

I90 – Nodine Exit, Winona County

EAB present 5-6 years?

5-10% of ash in area were dead

Most of rest had noticeable decline

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Recognizing EAB Infested Trees

Nodine Exit trees > 100 larval galleries /

square meter of bark

Minnesota First Detectors

Recognizing EAB Infested Trees

Nodine Exit trees Woodpeckers could

barely fly anymore

Minnesota First Detectors

Recognizing EAB Infested Trees

St Paul 1 – found 2009

EAB present 3-4 years

No dead trees Canopy

thinning on ~50 trees

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Recognizing EAB Infested Trees

St Paul 1 – found 2009 Woodpecking apparent on

declining trees and trees without decline

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Recognizing EAB Infested Trees

Woodpecking a better indicator of EAB than decline

EAB Negative

EAB Positive

Minnesota First Detectors

Recognizing EAB Infested Trees

St Paul 2 – Summit / Dale Area

~4 years old when found Decline, woodpecking,

bark cracks on < 10 trees

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Recognizing EAB Infested Trees

Shoreview ~3 years old when found Decline in one tree

initially – no woodpecking seen in July

Minnesota First Detectors

Recognizing EAB Infested Trees

Shoreview ~3 years old when found Decline in one tree

initially – heavy woodpecking by November – also showing up on other trees in area

Minnesota First Detectors

Recognizing EAB Infested Trees

Houston ~3 years old when found Only found due to

extensive searching

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Recognizing EAB Infested Trees

Increasing Numbers

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Sanitation

Chemicals

Biological Control

EAB Suppression

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Identify EAB infested trees via woodpecking

Remove infested trees prior to adult emergence

EAB Sanitation

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EAB Chemicals

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EAB Biocontrol

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EAB Quarantine

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EAB Quarantine

No Regulated Articles are legally allowed to move outside of a quarantine (untreated or treated), unless they are accompanied by a certificate. Certificates are only available when a compliance agreement is signed between the Minnesota Department of Agriculture and the firm interested in moving the regulated article.

Minnesota First Detectors

Regulated ArticlesEmerald ash borer in any living stage

of developmentAsh treesAsh limbs / branchesAsh stumps and rootsAsh logsAsh chips (wood or bark)Firewood of any non-coniferous

species

EAB Quarantine

Minnesota First Detectors

NO

OK

Maybe

EAB Quarantine