Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Invasive Species 101:
Primer for Green Industry Professionals
                  Robert Emanuel, Ph.D.
  Water Resources an...
What are invasive species?
Why should we care?
Biology & management
Some invaders to watch
What can professio...
Invasive species means an alien species
whose introduction does or is likely to
cause economic or environmental harm
or ha...
Biological invaders destroy habitats or 
    out‐compete native plants and 
   Why should we care?...
Understanding Biological Invasions
Definitions: Invasive Plants
   Exotics                           ...
What makes a plant invasive?
Lack normal environmental constraints
Fast growth and reproduction
Highly adaptable a wide ra...
Key Stages in Plant Invasions


                         Lag Time          Invasi...
What does this mean for management?

                                  People notice them here
The Wildfire Model
How do we manage invasive plants?
Prevention *
Quarantine before introduction
Monitoring & mapping
Chemical treatment (her...
Some Invasive Species

High Desert Oregon & Environs
Flowering Rush: Butomus umbellatus
Photo – butterfly bush infestation in 
                    Lane Co.

Butterfly Bush: Buddleja davidii
Photo ‐ butterfly bush infestation in 
                     Lane Co.

Butterfly Bush (Buddleia davidii)         Photo: ...
Butterfly bush (Buddleja davidii and B. variants)
Purple Loosestrife: Lythrum salicaria
Purple loosestrife (Lythrum salicaria)
Photos: King County , WA
Garden Loosestrife: Lysimarchia vulgaris
Desert Indigobush: Amorpha fruticosa
Photo ‐ knotweed 

Japanese Knotweed: Fallopia cuspidatum
Glenn Miller, ODA
Giant Knotweed: Fallopia sachalinese
Photo ‐ knotweed 

         Knotweed: Fallopia x bohemicum
Japanese knotweed (Fallopia cuspidatum) & giant knotweed (Fallopia sachalinense)
Photo: OSU
Yellow Flag Iris: Iris pseudacorus
Yellow flag iris (Iris psuedacoris)
Photo: Paul Wray, Iowa State University
                                          Russian Olive: Elaeagnus angustifolia
Photo: USFS
Tree of Heaven: Ailanthus altissima
Jan Samanek, State Phytosanitary Administration, Czenia
Tamarix ramosissima
Tamarix parviflora Leslie 
Gulch, OR, 2007
T. parviflora
invading the 
Lower Owyhee 
River, OR, 2007
Eric Coombs, ODA
                        Eric Coombs, ODA

Mediterranean sage: Salvia aethiopis
Eric Coombs, ODA
Mediterranean Sage (Salvia aethiopis )
Clary Sage: Salvia sclarea
Patterson’s Curse: Echium plantagineum
Patterson’s Curse (Echium plantagineum)
Leafy Spurge: Euphorbia esula
Leafy Spurge (Euphorbia esula)
BS Thurner Hof
Myrtle spurge: Euphorbia myrsintes
BS Thurner Hof
Myrtle spurge (Euphobia myrsintes)
Yellow Star Thistle: Centaurea solistialis
Yellow Star Thistle (Centaurea solistialis)
Wendy VanDyk Evans, Bugwood,org
Dave Powell, USFS
Yellow Toadflax: Linaria vulgaris
John Cardina, Ohio State 
University, Bugwood,org
John Cardina, Ohio State University, Bugwood,org
Steve Dewey, Utah State University, Bugwood,org
Elizabeth Bella, USFS
Dalmatian toadflax: Linaria dalmatica
Michael Shephard, USDA Forest Service
Orange Hawkweed: Hieracium aurantiacum
Orange Hawkweed: Hieracium aurantiacum
Michael Shephard, USDA Forest Service
Orange Hawkweed: Hieracium aurantiacum
Orange Hawkweed (Hieracium aurantiacum)
Photos: Michael L. Charters
Spanish Broom: Spartium junceum
Scotch Broom: Cytisus scoparius
French Broom: Genista monspessulana
But wait! There’s MORE!
Photo: University of Georgia
Herb Robert: Geranium robertianum
Fennel: Foeniculum vulgare
Photo: Johnathan J. Stegeman
Bachelor’s button: Centaurea cyanus
Richard Old
Camelthorn: Alhagi maurorum
Only you can prevent the invasion!
What can Green Industry Professionals Do?

 Know the enemy & teach others about them
 Research new stock before you order ...
What can Green Industry Professionals Do?

 Get involved in landscape management 
 ordinances where appropriate
 Get invol...
What can industry professionals do?
 Watch for hitchhikers in nursery stock
 Use weed‐free soil and mulch
 Watch introduct...
Commercial Wildflower or Plant Border 
   Mixes (AKA “Meadow in a Can”)
If you have a known invasive 
          (but a client can’t part with it)

Deadhead faithfully
Use root barriers
Dispose o...
For Water Gardens
Always wash new introductions (think snails)
Keep water gardens separate from native waters
Never dump w...
Some Resources
Invasive Spp. Web Resources
All of this information located at:
Oregon Invasive Species Council
People and Organizations
 Brooke Gray Eastern Oregon EDRR 
Coordinator, Weed Educator: 541‐447‐6228
 Dan Sherwin, Deschute...

Robert M. Emanuel, Ph.D.
Water Resources & Community Development
Tillamook & Clatsop counties
2204 Fourth Stre...
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
High Desert Green Industry  Invasive  Spp
Upcoming SlideShare
Loading in …5

High Desert Green Industry Invasive Spp


Published on

Published in: Technology
  • Be the first to comment

  • Be the first to like this

High Desert Green Industry Invasive Spp

  1. 1. Invasive Species 101: Primer for Green Industry Professionals Robert Emanuel, Ph.D. Water Resources and Community Development Faculty, Tillamook and Clatsop counties
  2. 2. Introduction What are invasive species? Why should we care? Biology & management Some invaders to watch What can professionals do? Resources for more information.
  3. 3. Invasive species means an alien species whose introduction does or is likely to cause economic or environmental harm or harm to human health.
  4. 4. Biological invaders destroy habitats or  out‐compete native plants and  animals. Why should we care? Invasive species costs Americans about  $143 billion/year! At least 30 new potential biological  invaders enter the US every day…
  5. 5. Understanding Biological Invasions
  6. 6. Definitions: Invasive Plants “Weed” Exotics A plant  (non‐native) growing  where you do  Lots of beneficial  not want it. species: Crops,  pasture, forestry  “Noxious” & ornamentals. A regulatory  designation. “Invasive” Spreads  Natives outside of  cultivation, and  Co‐evolution  causes  with other  environmental species, our  & economic  natural heritage harm.
  7. 7. What makes a plant invasive? Lack normal environmental constraints Fast growth and reproduction Highly adaptable a wide range of conditions Often can transform their environment Promoted by new or existing disturbances Less biodiversity in the native ecosystem Sometimes work with other invasive species
  8. 8. Key Stages in Plant Invasions Escape Lag Time Invasion Introduction Area Infested Cost Time
  9. 9. What does this mean for management? People notice them here Prevention or  Eradication Local control and  (Inexpensive) management only  (Expensive) Control Costs Area Infested Introduction Detection: focus resources here Time
  10. 10. The Wildfire Model
  11. 11. How do we manage invasive plants? Prevention * Quarantine before introduction Monitoring & mapping Chemical treatment (herbicides) Biological controls (biocontrol) Cultural treatment (hand pulling, cutting, etc.)
  12. 12. Some Invasive Species High Desert Oregon & Environs
  13. 13. Flowering Rush: Butomus umbellatus
  14. 14. Photo – butterfly bush infestation in  Lane Co. Butterfly Bush: Buddleja davidii
  15. 15. Photo ‐ butterfly bush infestation in  Lane Co. Butterfly Bush (Buddleia davidii) Photo: OSU
  16. 16. Butterfly bush (Buddleja davidii and B. variants)
  17. 17. Purple Loosestrife: Lythrum salicaria
  18. 18. Purple loosestrife (Lythrum salicaria)
  19. 19. Photos: King County , WA Garden Loosestrife: Lysimarchia vulgaris
  20. 20. Desert Indigobush: Amorpha fruticosa
  21. 21. Photo ‐ knotweed  Japanese Knotweed: Fallopia cuspidatum
  22. 22. Glenn Miller, ODA Giant Knotweed: Fallopia sachalinese
  23. 23. Photo ‐ knotweed  Knotweed: Fallopia x bohemicum
  24. 24. Japanese knotweed (Fallopia cuspidatum) & giant knotweed (Fallopia sachalinense)
  25. 25. Photo: OSU Yellow Flag Iris: Iris pseudacorus
  26. 26. Yellow flag iris (Iris psuedacoris)
  27. 27. Photo: Paul Wray, Iowa State University Russian Olive: Elaeagnus angustifolia
  28. 28. Photo: USFS Tree of Heaven: Ailanthus altissima
  29. 29. Jan Samanek, State Phytosanitary Administration, Czenia
  30. 30. Tamarix ramosissima
  31. 31. Tamarix parviflora Leslie  Gulch, OR, 2007
  32. 32. T. parviflora invading the  Lower Owyhee  River, OR, 2007
  33. 33. Eric Coombs, ODA Eric Coombs, ODA Mediterranean sage: Salvia aethiopis
  34. 34. Eric Coombs, ODA
  35. 35. Mediterranean Sage (Salvia aethiopis )
  36. 36. Clary Sage: Salvia sclarea
  37. 37. Patterson’s Curse: Echium plantagineum
  38. 38. Patterson’s Curse (Echium plantagineum)
  39. 39. Leafy Spurge: Euphorbia esula
  40. 40. Leafy Spurge (Euphorbia esula)
  41. 41. BS Thurner Hof Myrtle spurge: Euphorbia myrsintes
  42. 42. BS Thurner Hof
  43. 43. Myrtle spurge (Euphobia myrsintes)
  44. 44. Yellow Star Thistle: Centaurea solistialis
  45. 45. Yellow Star Thistle (Centaurea solistialis)
  46. 46. Wendy VanDyk Evans, Bugwood,org
  47. 47. Dave Powell, USFS Yellow Toadflax: Linaria vulgaris
  48. 48. John Cardina, Ohio State  University, Bugwood,org
  49. 49. John Cardina, Ohio State University, Bugwood,org
  50. 50. Steve Dewey, Utah State University, Bugwood,org
  51. 51. Elizabeth Bella, USFS
  52. 52. Dalmatian toadflax: Linaria dalmatica
  53. 53. Michael Shephard, USDA Forest Service Orange Hawkweed: Hieracium aurantiacum
  54. 54. Orange Hawkweed: Hieracium aurantiacum
  55. 55. Michael Shephard, USDA Forest Service Orange Hawkweed: Hieracium aurantiacum
  56. 56. Orange Hawkweed (Hieracium aurantiacum)
  57. 57. Photos: Michael L. Charters Spanish Broom: Spartium junceum
  58. 58. Scotch Broom: Cytisus scoparius
  59. 59. French Broom: Genista monspessulana
  60. 60. But wait! There’s MORE!
  61. 61. Photo: University of Georgia Herb Robert: Geranium robertianum
  62. 62. Fennel: Foeniculum vulgare
  63. 63. Photo: Johnathan J. Stegeman Bachelor’s button: Centaurea cyanus
  64. 64. Richard Old Camelthorn: Alhagi maurorum
  65. 65. Only you can prevent the invasion!
  66. 66. What can Green Industry Professionals Do? Know the enemy & teach others about them Research new stock before you order it Grow, sell or design for native & non‐invasive  plants wherever possible Help the public with information on treatment
  67. 67. What can Green Industry Professionals Do? Get involved in landscape management  ordinances where appropriate Get involved in weed management boards Help support local weed identification and  education efforts Help support research focused on invasives,  control and alternatives
  68. 68. What can industry professionals do? Watch for hitchhikers in nursery stock Use weed‐free soil and mulch Watch introductions for aggressive behavior Discourage use of commercial wildflower or  other mixes.  Check clothes, vehicles, equipment, & pets
  69. 69. Commercial Wildflower or Plant Border  Mixes (AKA “Meadow in a Can”)
  70. 70. If you have a known invasive  (but a client can’t part with it) Deadhead faithfully Use root barriers Dispose of plant material properly—bagged in  the garbage or burned (completely) Contain it, control it, or cage it!
  71. 71. For Water Gardens Always wash new introductions (think snails) Keep water gardens separate from native waters Never dump water garden materials or water  into native waters Research plants for invasive potential—many  commonly used aquatics are!
  72. 72. Some Resources
  73. 73.
  74. 74. Invasive Spp. Web Resources All of this information located at: Oregon Invasive Species Council Oregon Invasive Species Hotline: National Invasive Species Clearinghouse: USDA PLANTS Database: WA State Noxious Weed Board: Idaho Weed Awareness: California Invasive Plant Council:‐  Be Plantwise:
  75. 75. People and Organizations Brooke Gray Eastern Oregon EDRR  Coordinator, Weed Educator: 541‐447‐6228 Dan Sherwin, Deschutes County Vegetation  Manager, ,  541‐322‐7135 Local Soil and Water Conservation Districts OSU Extension Service offices in each county
  76. 76. Questions? Robert M. Emanuel, Ph.D. Water Resources & Community Development Tillamook & Clatsop counties 2204 Fourth Street Tillamook, OR 97141 (503) 842‐5708 X 2