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Forest Health: Forest Ecology, Tree Vigor, and Landowner Objectives

Forest Health: Forest Ecology, Tree Vigor, and Landowner Objectives. Karen Ripley, Forest Entomologist Washington Department of Natural Resources December, 2003. Forest Entomology and Pathology. Organisms or events that: Kill trees Slow tree growth Damage wood products.

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Forest Health: Forest Ecology, Tree Vigor, and Landowner Objectives

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  1. Forest Health: Forest Ecology, Tree Vigor, and Landowner Objectives Karen Ripley, Forest Entomologist Washington Department of Natural Resources December, 2003

  2. Forest Entomology and Pathology Organisms or events that: • Kill trees • Slow tree growth • Damage wood products Ips bark beetle Weevil killed top Ambrosia beetle damage

  3. Forest Health Greater attention to: - Forest ecosystem processes - Forests resilient and resistant to pests - Landowner objectives Fir engraver beetle (Scolytus ventralis) gallery in grand fir

  4. Ecosystem Processes Insects and diseases cause structural and functional changes Lodgepole pine killed by mountain pine beetle Dendroctonus ponderosae “Pocket” of laminated root rot Phellinus weirii

  5. Ecosystem Processes Mortality and decadence produce important habitats Western pine beetle Dendroctonus brevicomis killed ponderosa pine

  6. Ecosystem Processes Some structures are highly vulnerable to change: • Older stands • Overstocked stands • Stands with multiple layers

  7. Forests resistant and resilient to insects and pathogens

  8. Priorities for tree growth: • Living tissue • Fine root and leaf production • Flower and seed production • Height, branch, root growth. Scar tissue. • Diameter growth and resistance to insects and diseases • Storage

  9. Vigorous trees can resist insects and pathogens Pitch tubes Caterpillar feet

  10. Vigorous trees can recover from damage or disease Adventitious root growth Fire scorched ponderosa pine

  11. Asian Long-horned Beetle Exotic Pests are BAD Gypsy moth Balsam woolly adelgid

  12. Landowner Objectives

  13. Seedlings are vulnerable to pests and the environment- Failure is expensive- Seed zone- “Go down one step in the series” Landowner Objectives: Successful Regeneration

  14. Improved stands represent more investment- Critical habitats- New tools are available Landowner Objectives: Prevent Losses

  15. Critical needs- Responsible profits- New pests Landowner Objectives: Intensive Management

  16. Monitor damage level and insect populations in order to make appropriate management choices Douglas-fir tussock moth early warning trap Douglas-fir tussock moth egg masses and female moths

  17. Monitor damage level and insect populations Aerial observer: Jeff Moore Summary Map

  18. See your own land: http://www.fs.fed.us/r6/nr/fid/as/quad/

  19. http://www.fs.fed.us/r6/nr/fid/as/quad/

  20. Conclusions: • Vigorous trees are GOOD • Exotic Pests are BAD

  21. Recognize important insects and diseases - Signs and symptoms - Potential impact to landowner objectives

  22. Recognize: - High risk habitats - Management techniques

  23. More information: www.fs.fed.us/r6/nr/fid Annual reports, pamphlets and aerial survey data DNR’s Forest Health Program (360) 902-1300 Common Tree Diseases of British Columbia (250) 363-0600

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