EAB: Biology and Identification - Wild Apricot Biology and... · City of Hamilton, California David...
Transcript of EAB: Biology and Identification - Wild Apricot Biology and... · City of Hamilton, California David...
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Laurie StepanekNebraska Forest Service
EAB:Biology and Identification
NebraskaForest
Service
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Penn. Dept ofConserv. & NRBugwood.org
Penn. Dept ofConserv. & NR
Bugwood.org
Agrilus species
Emerald ash borer Bronze birch
borer Two-lined chestnut borer
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Green
White
Some native ash speciesFraxinus spp.
Black
Blue
Velvet
Pumpkin
Marshall’s SeedlessPatmore
Autumn Purple
(cultivars)
Oregon
California
Texas
Carolina
Mexican
Chihuahuan
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Green > White, Black > Blue
Susceptibility
Kathleen KnightUS Forest Service
Kathleen KnightUS Forest Service
Lingering ash
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Not true ash species
Wafer-ashWater-ashHoptree
Ptelea spp.
Mountain-ash
Sorbus spp.
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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
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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
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David CappaertMichigan State Univ.
Bugwood.org
Adult emergence begins:
> mid-May
> 450-500 degree days
(base temp 50o F)
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Leslie J MehrhoffUniv of ConnecticutBugwood.org
Black locust in full bloom
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Laurie StepanekNebraska Forest Service
Debbie MillerUS Forest ServiceBugwood.org
Maturation feeding: 2 weeks
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Females lay 50-90 eggs
On ash bark
Eggs hatch in 1-2 weeks
All photos:Houping LiuMichigan State UniversityBugwood.org
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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
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Steven KatovichUS Forest ServiceBugwood.org
Sparse foliage
Branch dieback
City of Boulderbouldercolorado.gov
Laurie StepanekNebraska Forest Service
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epicormic sprouts
Edward CzerwinskiOntario Ministry of Nat. Res.
bugwood.org Laurie StepanekNebraska Forest Service
bark stripping (woodpeckers)
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Laurie StepanekNebraska Forest Service
University of Illinois
Most suspicious symptoms:
Winding tunnels under bark
D-shaped exit holes
David CappaertMichigan State Univ.
Bugwood.org
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1- or 2-year lifecycle
Early-stage infestation
(tree relatively healthy)
Older, established infestation
(tree stressed)
2 years
1 year
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Overwinters as a larva
(prepupa)
Pupates in spring
David CappaertMichigan State UnivBugwood.org
David CappaertMichigan State UnivBugwood.org
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Pupation: 2-4 weeks
Debbie MillerUS Forest ServiceBugwood.org
Lifecycle complete
Debbie MillerUSDA Forest Service, Bugwood.org
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Pause . . .
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David CappaertMichigan State UnivBugwood.org
James SolomonUSDA Forest ServiceBugwood.org
Emerald ash borer
Lilac borerLilac-ash borer
Ash borer
beetle(Coleoptera)
moth(Lepidoptera)
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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
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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
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Emerald ash borer
Lilac borerLilac-ash borer
Ash borer
L StepanekNFS Laurie Stepanek
Nebraska Forest Service
D-shape1/8 inch
round1/4 inch
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Laurie StepanekNebraska Forest Service
L StepanekNFS
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L StepanekNFS
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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
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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
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Questions?
Nebraska Forest Service
EAB website:
nfs.unl.edu/EAB