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TOM SCHMEELKMIKE PARISIOCOLLEEN TEERLING
MAINE FOREST SERVICE
DEPARTMENT OF AGRICULTURE, CONSERVATION AND FORESTRY
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Emerald Ash Borer (EAB)
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Emerald Ash Borer
• First detected in Maine in 2018
• Northern (Aroostook county) and southern (York county) Maine
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• EAB attacks all species of ash (Fraxinus spp.) grown in N.A.
• None of our species are tolerant against attack
• Almost all attacked ash trees die • Millions of ash trees have died
since EAB was discovered in 2002
Maine Department of Agriculture
• Numerous industries affected:• Furniture / flooring• Tool making• Sports equipment• Native American basket making
Why is EAB a problem?
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Spreads easily via firewood movement >>75% of detected
infestations are due to movement of firewood
Maine Department of Agriculture
Early detection is difficult: Adult beetle is tiny Signs are hard to see Symptoms are confusing
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EAB – Quarantine
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Woodpecker Activity
David Cappaert, Michigan State University, Bugwood.org Tom Bain, GeoEcology Mark Whitmore, Cornell University
Recognizing signs of EAB
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Larval Galleries
Larvae tunnel under bark and feed on cambium in S-shaped galleries
Feed from July to October
Extensive larval feeding disrupts translocation
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Browntail Moth
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Current situation
Browntail moth populations continue to increase and expand inland in Maine affecting more towns
It has been found in 12 of Maine’s 16 counties through various surveys
Aerial surveys during the fall and spring revealed more than 126,000 acres of damage continuing a steady increase over the last 3 years
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Gypsy Moth
• Intentionally brought over from Europe in 1869
• USFS spends 13 million annually to control it
• Quarantine has now expanded to include all of Maine (new map not yet available)
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• Non-native from Europe, brought over in soil
• Found from Kittery – Bar Harbor
• Released Cyzenis albicans in Bath ME in May 2019, other towns since 2013
• Flies recovered 2016-2018
• Ongoing efforts to sample for parasitoid
Winter Moth
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DO NOT MOVE LANDSCAPE MATERIALfrom infested areas as the cocoons of winter moth are in the soil from June through November.OR apple or blueberry
Photo: Maine Forest Service
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Approx. 17 million acres of defoliation in Quebec since 2006
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Spruce Budworm
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Spruce Budworm Task Force in Mainesprucebudwormmaine.org
@SpruceBudwormMaine on Facebook
Maine Forest Servicemaineforestservice.gov
- Populations appear to be building in Maine - Defoliation remained undetectable during 2018 aerial
survey
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Hemlock Woolly Adelgid
• Aphid-like
• Invasive Species from Asia
• Kills tree through feeding over a period of years
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Invasives not yet in Maine:
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Thinning crowns
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Not EAB: dead ends, Y-forks
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What is Brown Spruce Longhorned Beetle (BSLB)?
Native to northern and central Europe and western Siberia
Feeds on stressed, dying and healthyspruce
Approx.
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How Serious a threat is BSLB?
Has not spread as quickly as some
Does spread in camp firewood
May have a strong preference for stressed trees
May thrive in wake of stress caused by native defoliators (egsprucebudworm)
Will tolerate Maine’s winter climate well
1975 Spruce Budworm Defoliation Eastern US & Canada
D.W. Williams & R.A. Birdsey, Richard . 2003. USDA FS Gen. Tech. Rep. NE-
308
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Where in North America is BSLB found?
Map: Google MapsNB Points Approx.
Single beetle in traps
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Beech leaf mining weevil (Orchestes fagi)
• Native to Europe
• 2012 found in Nova Scotia Sydney and Halifax
• Attacks American and European beech causing mortality
Image: Gyorgy CsokaImage: Siga/Wikimedia Commons
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Oak WiltVascular Wilt
Vectored by beetles; spread by root grafts
Potential movement in logs/firewood (sites in NY strongly suggest firewood origin)
Primary Cue:Significant Early Leaf Drop on Oak (July = prime time)
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Oak Wilt
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