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Hemlock Woolly Adelgid

Hemlock Woolly Adelgid. Contact Information. Jim Esden Dept. of Forests, Parks and Recreation 100 Mineral Street, Suite 304 Springfield, VT 05156 802-885-8822 jim.esden@state.vt.us. Life Cycle. Habitat. Where does HWA live?. Photo: Anne Eschtruth. Photo: B. Burns.

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Hemlock Woolly Adelgid

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  1. Hemlock Woolly Adelgid

  2. Contact Information • Jim Esden • Dept. of Forests, Parks and Recreation 100 Mineral Street, Suite 304 Springfield, VT 05156 • 802-885-8822 • jim.esden@state.vt.us

  3. Life Cycle

  4. Habitat Where does HWA live?

  5. Photo: Anne Eschtruth

  6. Photo: B. Burns

  7. Surveying and Reporting

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

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

  10. Key messages

  11. Credit: A. Kanoti

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

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

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

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

  16. Where softwoods are critical, consider species diversification

  17. 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.

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

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

  20. Natural Control

  21. Biological controls hold promise

  22. Chemical Control

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

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

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

  26. The “X” Factor = YOU

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

  28. For more information or to report a find • jim.esden@state.vt.us • Jim Esden 802-885-8822 • http://www.vtfpr.org/protection/hwafactsheet.cfm • http://vermonttv.net/Hemlock.html

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