Vermont Forest Pest First Detector Program Forests, Parks & Recreation Agriculture, Food & Markets...
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Vermont Forest Pest First Detector Program Forests, Parks & Recreation Agriculture, Food & Markets Module 3C: Vermont Forest Pest First Detector Program Presented by: Rhonda Mace USDA-APHIS
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Transcript of Vermont Forest Pest First Detector Program Forests, Parks & Recreation Agriculture, Food & Markets...
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Forests, Parks & RecreationAgriculture, Food & Markets
Module 3C:Vermont Forest Pest
First Detector Program
Presented by:
Rhonda MaceUSDA-APHIS
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Why Should We Be Concerned about the Asian Longhorned Beetle?
ALB attacks and kills a wide range of native hardwood trees, including maple, elm, birch and ash.
Infestation can go a years without being detectedInsecticides aren’t an economically feasible option
for a wide scale infestation50% of VT forests are host trees
**Chicago, Illinois and Hudson County, New Jersey and Islip, NY has since declared successful eradication of ALB.
Map adapted from Jim Esden, VT Forests, Parks, and Recreation
2010 LEAP Workshop
OhioDetected in Bethel
July 2011
MassachusettsDetected in Boston
area in 2010
Why is ALB Difficult to Control?
ALB often attacks the tops of trees first.ALB has no known natural enemies in the USA or
Canada.Detection is based only upon visual surveys of trees.Humans can easily aid in the spread of this pest by
moving infested wood, especially firewood.Attacks upwards of 24 species of trees
Asian longhorned beetle life cycle
Reproduction1. Males and females travel
infrequently, they use physical contact and pheromones to find mates.
2. Lay eggs in shallow dug-out areas of the bark (oviposition sites) from mid-July-August.
3. Eggs hatch in 10-15 days.
Larvae
1st and 2nd instar larvae feed on the cambium layer.
3rd, 4th and 5th instars feed on and tunnel through the sapwood and heartwood.
Larval and pupal stages over-winter in the tree.
Pupae
5th instar develops into a pupa.Pupal stage is approximately 2-3
weeks.After pupation, the insect emerges as
an adult.
Adult BeetleEmerge summer to mid Fall.
Exit holes- nearly same diameter as a dime and round.
Beetle is 1 to 1 ½ inches
long.Irregularly shaped
whitespots on elytra
Life span ≥ 2 months.
Adult Beetle cont’d…
Lay between 60 to 160 eggs.
Adult beetles have 1 generation per year.
Susceptible Tree GeneraMaple including boxelder**Elm*Horsechestnut, buckeyes*Birch*Willow*Katsura treeSilk treeAshLondon plane PoplarEuropean mountain ashHackberry**,*=preferred host
Identifying Adult ALB
Shiny, black body
Irregular, white, or yellowish splotches
Black and white,banded antennae
1 1/2
Body length is3/4 to 1 1/2 inches
Commonly Confused With ALB
Whitespotted Sawyer Beetle• Native to northeastern US• Host trees are coniferous
Key differentiating features:• White spot between the wing
covers of the sawyer.• WSS is a bronzy, dull black,
while the Asian longhorned beetle is true black and shiny
Commonly Confused With ALB
Northeastern Sawyer Beetle• Native to northeastern US• Host trees are coniferous
Key differentiating features:• Brown dappled wing
covers with dark and light spotting
• Faint white spot at top of wing covers
CongratulationsYou have now completed Module 3C.
Please return to the First Detector Resource webpage at
www.vtinvasives.organd complete the Module 3C Quiz.
Rhonda MaceUSDA-APHIS-PPQ
