eab: biology and identification - wild apricot biology and... · city of hamilton, california david...

Laurie StepanekNebraska Forest Service

EAB:Biology and Identification

NebraskaForest

Service

Penn. Dept ofConserv. & NRBugwood.org

Penn. Dept ofConserv. & NR

Bugwood.org

Agrilus species

Emerald ash borer Bronze birch

borer Two-lined chestnut borer

Green

White

Some native ash speciesFraxinus spp.

Black

Blue

Velvet

Pumpkin

Marshall’s SeedlessPatmore

Autumn Purple

(cultivars)

Oregon

California

Texas

Carolina

Mexican

Chihuahuan

Green > White, Black > Blue

Susceptibility

Kathleen KnightUS Forest Service

Kathleen KnightUS Forest Service

Lingering ash

Not true ash species

Wafer-ashWater-ashHoptree

Ptelea spp.

Mountain-ash

Sorbus spp.

EAB: Basic LifecycleEgg

Larva

PupaAdult Debbie MillerUSDA Forest Service, Bugwood.org

City of Hamilton, California

David CappaertMichigan State Univ, Bugwood.org

Houping LiuMichigan State University

Bugwood.org

David CappaertMichigan State Univ.

Bugwood.orgDebbie MillerUS Forest ServiceBugwood.org

Joseph O’BrienUS Forest Service

Bugwood.org

Adult emergence in spring

D-shaped exit holes

University of Illinois

David CappaertMichigan State Univ.

Bugwood.org

Adult emergence begins:

> mid-May

> 450-500 degree days

(base temp 50o F)

Leslie J MehrhoffUniv of ConnecticutBugwood.org

Black locust in full bloom

Laurie StepanekNebraska Forest Service

Debbie MillerUS Forest ServiceBugwood.org

Maturation feeding: 2 weeks

Females lay 50-90 eggs

On ash bark

Eggs hatch in 1-2 weeks

All photos:Houping LiuMichigan State UniversityBugwood.org

Creamy white larva

“Small tapeworm”

4 stages (instars)

David CappaertMichigan State Univ.

Bugwood.org

Feeds in phloem and outer xylem

Edward CzerwinskiOntario Ministry of Natural ResourcesBugwood.org

Steven KatovichUS Forest ServiceBugwood.org

Sparse foliage

Branch dieback

City of Boulderbouldercolorado.gov

Laurie StepanekNebraska Forest Service

epicormic sprouts

Edward CzerwinskiOntario Ministry of Nat. Res.

bugwood.org Laurie StepanekNebraska Forest Service

bark stripping (woodpeckers)

Laurie StepanekNebraska Forest Service

University of Illinois

Most suspicious symptoms:

Winding tunnels under bark

D-shaped exit holes

David CappaertMichigan State Univ.

Bugwood.org

1- or 2-year lifecycle

Early-stage infestation

(tree relatively healthy)

Older, established infestation

(tree stressed)

2 years

1 year

Overwinters as a larva

(prepupa)

Pupates in spring

David CappaertMichigan State UnivBugwood.org

David CappaertMichigan State UnivBugwood.org

Pupation: 2-4 weeks

Debbie MillerUS Forest ServiceBugwood.org

Lifecycle complete

Debbie MillerUSDA Forest Service, Bugwood.org

Pause . . .

David CappaertMichigan State UnivBugwood.org

James SolomonUSDA Forest ServiceBugwood.org

Emerald ash borer

Lilac borerLilac-ash borer

Ash borer

beetle(Coleoptera)

moth(Lepidoptera)

Emerald ash borer

Lilac borerLilac-ash borer

Ash borer

David CappaertMichigan State UnivBugwood.org

David CappaertMichigan State Univ

Bugwood.org

flattened (“tapeworm”)no legs

rounded bodylegs present

Emerald ash borer

Lilac borerLilac-ash borer

Ash borer

Laurie StepanekNebraska Forest Service

Art WagnerWashington State Dept of Ag

Bugwood.org

tunnels just beneath the bark

tunnels deep into wood

Emerald ash borer

Lilac borerLilac-ash borer

Ash borer

L StepanekNFS Laurie Stepanek

Nebraska Forest Service

D-shape1/8 inch

round1/4 inch

Laurie StepanekNebraska Forest Service

L StepanekNFS

L StepanekNFS

James SolomonUSDA Forest Service

Bugwood.org

Flatheaded appletree borer

Carpenterworm

(copyright) Lewis Scharpf

Ash and privet borer Redheaded ash borer

Howard Ensign EvansColorado State UniversityBugwood.org

Joseph BergerBugwood.org

Other borers of ash

EAB & Look-alikes

Susan Ellisbugwood.org

Pennsylvania Dept of Conserv. & Nat. Resourcesbugwood.org

Pennsylvania Dept of Conserv. & Nat. Resources

bugwood.org

University of Illinois

EAB

Dogbane beetle

Tiger beetle

Gold dust buprestid

Leafhopper

Laurie StepanekNebraska Forest Service

Questions?

Nebraska Forest Service

EAB website:

nfs.unl.edu/EAB