Hemlock Woolly AdelgidHemlock Woolly Adelgid
Contact InformationContact Information
Jim EsdenJim Esden Dept. of Forests, Parks and Recreation Dept. of Forests, Parks and Recreation
100 Mineral Street, Suite 304 100 Mineral Street, Suite 304 Springfield, VT 05156Springfield, VT 05156
802-885-8822802-885-8822 [email protected] [email protected]
Life CycleLife Cycle
HabitatHabitat
Where does HWA live?Where does HWA live?
Photo: Anne Eschtruth
Photo: B. Burns
Surveying and ReportingSurveying and Reporting
Where to look?Where to look?
Good habitatGood habitat
Location, location, Location, location, locationlocation
Site vs. standSite vs. stand
How to lookHow to look
Branch = 1 meterBranch = 1 meter 200 branches/site200 branches/site What you can reachWhat you can reach Binoculars optionalBinoculars optional Light over shoulderLight over shoulder Free hand as guide & Free hand as guide &
backgroundbackground
Hemlock Woolly Adelgid Survey Form
Inspect 200 branches (39”), <20 branches/ tree. Sketch location on map or on back. GPS in NAD83 Decimal degrees
Location Name Town
Landowner &/or Site Information
Observer(s) Hours
Team Leader Leader Contact Info
GPS North GPS West Date
# of Branches Examined # of Samples
Collected HWA Present?
% of Branches Examined on Planted (not Wild) Trees Circle one 0-25% 25-50% 50-75% 75-100%
If HWA is present or suspected, fill out the information below.
Sample ID Location description (may include GPS)
Notes:
Send form and samples to: Trish Hanson
Forest Protection Entomologist Forest Biology Lab
103 South Main Street, Env./Ag. Lab. Bldg. Waterbury, VT 05671-0409
Key messages Key messages
Credit: A. KanotiCredit: A. Kanoti
Healthy trees, with Healthy trees, with adequate moisture, are adequate moisture, are more likely to survivemore likely to survive. .
Don’t “salvage” hemlocks by cutting prematurely.Don’t “salvage” hemlocks by cutting prematurely.
…we don’t know the impact in northern New England.
Don’t “salvage” hemlocks by cutting prematurely..Don’t “salvage” hemlocks by cutting prematurely..……Infested trees take years to succumb. Infested trees take years to succumb.
Don’t “salvage” hemlocks by cutting prematurely..Don’t “salvage” hemlocks by cutting prematurely..……Will remove the potentially resistant treesWill remove the potentially resistant trees
Where softwoods are Where softwoods are critical, consider species critical, consider species
diversificationdiversification
Infested (Previously reported)
Infested (Newly reported)Uninfested
Hemlock can only be received by facilities with a Compliance Agreement
Hemlock wood products are regulated by Hemlock wood products are regulated by quarantine. quarantine.
In infested stands, conduct harvests between August and March, when the insect is immobile.
In critical habitats, like In critical habitats, like deer wintering areas and deer wintering areas and near water, even unthrifty near water, even unthrifty hemlocks provide benefits. hemlocks provide benefits.
Natural ControlNatural Control
Biological controls hold promise
Chemical ControlChemical Control
Insecticides are generally Insecticides are generally impractical in the forest. impractical in the forest.
Systemic insecticides may Systemic insecticides may protect individual trees. protect individual trees.
Vermont Strategy- Slow the SpreadVermont Strategy- Slow the Spread
Eradication of outlying populationsEradication of outlying populations Suppression activities along the leading edgeSuppression activities along the leading edge Integrated management in infested areasIntegrated management in infested areas SurveysSurveys QuarantineQuarantine Preserving genetic resistancePreserving genetic resistance ““X” FactorX” Factor
““X” Factor –X” Factor –Underlying concepts:Underlying concepts:
Early detection is criticalEarly detection is critical
Most discoveries are made by informed Most discoveries are made by informed citizenscitizens
The “X” Factor = YOUThe “X” Factor = YOU
What can you do?What can you do?
Be on the look out – call if you find itBe on the look out – call if you find it Take your bird feeder down in early springTake your bird feeder down in early spring Don’t buy nursery stock from infested areasDon’t buy nursery stock from infested areas Keep your hemlocks as healthy as possibleKeep your hemlocks as healthy as possible Don’t rush to salvage hemlock prematurelyDon’t rush to salvage hemlock prematurely Get others involved – start a local monitoring Get others involved – start a local monitoring
programprogram
For more information For more information or to report a findor to report a find
[email protected] Jim Esden 802-885-8822Jim Esden 802-885-8822
http://www.vtfpr.org/protection/hwafactsheet.cfm
http://vermonttv.net/Hemlock.htmlhttp://vermonttv.net/Hemlock.html
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