Hemlock Woolly Adelgid. Contact Information Jim Esden Jim Esden Dept. of Forests, Parks and Recreation 100 Mineral Street, Suite 304 Springfield, VT 05156.

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Presentation transcript:

Hemlock Woolly Adelgid

Contact Information Jim Esden Jim Esden Dept. of Forests, Parks and Recreation 100 Mineral Street, Suite 304 Springfield, VT Dept. of Forests, Parks and Recreation 100 Mineral Street, Suite 304 Springfield, VT

Life Cycle

Habitat Where does HWA live?

Photo: Anne Eschtruth

Photo: B. Burns

Surveying and Reporting

Where to look? Good habitat Good habitat Location, location, location Location, location, location Site vs. stand Site vs. stand

How to look Branch = 1 meter Branch = 1 meter 200 branches/site 200 branches/site What you can reach What you can reach Binoculars optional Binoculars optional Light over shoulder Light over shoulder Free hand as guide & background Free hand as guide & background

Key messages

Credit: A. Kanoti

Healthy trees, with adequate moisture, are more likely to survive.

Don’t “salvage” hemlocks by cutting prematurely. …we don’t know the impact in northern New England.

Don’t “salvage” hemlocks by cutting prematurely.. …Infested trees take years to succumb.

Don’t “salvage” hemlocks by cutting prematurely.. …Will remove the potentially resistant trees

Where softwoods are critical, consider species diversification

Infested (Previously reported) Infested (Newly reported) Uninfested Hemlock can only be received by facilities with a Compliance Agreement Hemlock wood products are regulated by quarantine.

In infested stands, conduct harvests between August and March, when the insect is immobile.

In critical habitats, like deer wintering areas and near water, even unthrifty hemlocks provide benefits.

Natural Control

Biological controls hold promise

Chemical Control

Insecticides are generally impractical in the forest. Systemic insecticides may protect individual trees.

Vermont Strategy- Slow the Spread Eradication of outlying populations Eradication of outlying populations Suppression activities along the leading edge Suppression activities along the leading edge Integrated management in infested areas Integrated management in infested areas Surveys Surveys Quarantine Quarantine Preserving genetic resistance Preserving genetic resistance “X” Factor “X” Factor

“X” Factor – Underlying concepts: Early detection is critical Early detection is critical Most discoveries are made by informed citizens Most discoveries are made by informed citizens

The “X” Factor = YOU

What can you do? Be on the look out – call if you find it Be on the look out – call if you find it Take your bird feeder down in early spring Take your bird feeder down in early spring Don’t buy nursery stock from infested areas Don’t buy nursery stock from infested areas Keep your hemlocks as healthy as possible Keep your hemlocks as healthy as possible Don’t rush to salvage hemlock prematurely Don’t rush to salvage hemlock prematurely Get others involved – start a local monitoring program Get others involved – start a local monitoring program

For more information or to report a find Jim Esden Jim Esden