asian longhorned beetle
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Asian Longhorned Beetle: Threat to shade trees across
North America
Kelli Hoover Penn State University University Park, PA
How did ALB get here and where
did it come from?
Beetle Damage
Katsura tree Cercidiphyllum
japonicum is a new confirmed
host for ALB
ALB impacts
• Estimated loss of 30% of urban trees, 26% of canopy cover, & value loss of $669 billion (Nowak et al. 2010)
• Infestations in NY, IL, NJ, OH, MA, Toronto & 9 countries in Europe
• Survey, eradication & prophylactic treatment $300-400 million to date
• 25 known host species in U.S. (47 worldwide)– Acer, Fraxinus, Ulmus, Populus, Salix
• USDA-APHIS management goal: eradication
Will the real ALB please stand up?• Large, 0.75-1.25 inches long; hardwoods• Very long black and white antennae• Body glossy black with irregular white spots
Male Female
Whitespotted sawyer (Monochamus scutellatus)
• Adults 0.75-1.25 inches in length; attack conifers• Males metallic black with 1 white dot at base of wing covers.
Females brown with speckles and with white dot at base of wing covers (red arrow)
• ALB does not have this white dot, though has many white spots on wing covers
Male Female
Anoplophora chinensis (citrus longhorned beetle)
For 5 points, which is ALB?
Other species mistaken for ALBhttp://www.uvm.edu/albeetle/identification/index.html
Northeastern sawyer
Cottonwood borer
Banded alder borer
Eyed elater
1996: First ALB discovered in New York City, NY
2000 2007: more in NJ, NY, and Staten Island
21,981 treesremoved in NJ
18,467 treesremoved in NY
1998: ALB discovered in Chicago, IL
2004 2006: Declared Eradicated
1,771 treesremoved in IL
Quarantine zoneafter expansion Nov. 2011
= 110 sq mi 23,540 infested trees,
almost 4 million surveyed August 15, 2008:
ALB first reported in Worcester, MAInfestation dates back before 1998
Quarantine zone 56 sq mi and 8,000+ trees
infested
June 17, 2011: ALB first reported in Bethel, Clermont
County, Ohio
Most recent ALB infestation discovery late August 2013, Farmingdale, NY
Core Area Before
Forest Block Before
AfterAfter
ALB Host Listhttp://www.uvm.edu/albeetle/hosts.htm
Japanese Lilac Kentucky Coffee Tree Dawn Redwood Southern Catalpa English Oak Swamp White Oak White Oak Bur Oak Basswood Tulip Tree Ironwood Serviceberry Gingko
Bald Cypress Honey Locust Turkish Filbert Linden Apple/ Crabapple Cherry/ Plum Hawthorn Dogwood Magnolia Pear Black Walnut Buckthorn
Possible Replacement Non-Hosts
SurveyUsed in Program
• Ground survey (accuracy ~30%)
• Tree climbing (60% accuracy; time consuming & expensive)
In Development
• Traps
• Detector Dogs
Identification of male-produced pheromone
• Compounds identified and confirmed after organic synthesis
• Structures unusual and have not been found in other cerambycids to date
OO
H
OO
H
I
II
4-(n-heptyloxy)butan-1-ol
4-(n-heptyloxy)butanal
Male produced pheromone is a 1:1 (v/v) blend of dialkylethers (MP)
Zhang et al. 2002
Quarantine Facility at PSU
Initial studies on pheromone/plant volatile combinations
1:1 MP PV
4:4 MP PV
8:8 MP PV
1:4 MP PV
1:8 MP PV
4:1 MP PV
8:1 MP PV PV
Control
0
1
2
3
4
5
6
7
8
9
2012 Number of beetles trapped in Harbin, China
Females Males
Beet
les
Caug
ht
b b b
c
b
b
a
* Difference between genders Females: p = 0.0041Males: p = 0.0818
a*
Trapping studies
Worcester, MA
2009-2013
Pheromone + blend of plant
volatilesIntercept Panel
trapsCore of
infestationTrapping sites
Traps set up within canopy
Some beetles caught in traps where trees had already been surveyed
or all infested trees thought to have been
removed. Further survey around trap catches
revealed undetected, infested trees.
Empty trapTrap caught beetlesTree removed earlierInfested Tree
27 July & 11 August, 2010 1 & 11 August, 2011
177 m exit holes
84 m oviposition pits only
New infested trees found: used to calculate potential draw distance
~40 m exit holes
New Exit Holes and Trap Catches
8/23/2011
8/8/2011 9/2/2011
8/23 /2011
9/13/2011
Empty trapTrap caught beetlesInfested Tree(exit or oviposition)
9/27/2011
9/26/2011
9/1/2011
8/23/2011
• Refine lures to improve trap catch and increase number of males and mated females caught
• Evaluate best trap spacing for optimum information on ALB populations in neighborhoods
• Trial deployment in high risk areas todetect new infestations
Ongoing ALB Trap Research
Funding Sources
USDA Forest Service
Northeastern Area
Thank
you
USDA -APHIS- Vic Mastro- Christine Markham- Al Sawyer- Ron Mack & Crew- Clint McFarland- Joe Gittleman
ALB Cooperative Eradication Program- Joan Mahoney- Ken Gooch- Kevin Freeman- Julie Coop (MA
DCR)- USDA Climbers- NY Agriculture and
markets crewUSDA Forest ServiceNorthern Research Station- Trotter Crew- Keena Crew
PSU: Maya Nehme, Peter Meng, Jim McNeil, David Long, Ezra Schwartzberg
Sentinel Plant Network
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