Mg Invasive Spp. Minicollege 8.6.09

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PowerPoint presentation to Oregon Master Gardeners at the OSU Master Gardener Minicollege, 2009, Corvallis, OR. This is not for distribution or reproduction.

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  • Mg Invasive Spp. Minicollege 8.6.09

    1. 1. Invasive Species 101:<br />A primer for Master Gardeners<br />Robert Emanuel<br />Water Resources and Community Development Faculty,<br />Tillamook and Clatsop counties<br />
    2. 2. Introduction<br />What are invasive species?<br />Why should we care?<br />Biology & management<br />Some PNWinvaders<br />What can gardeners do about them?<br />Resources for more information.<br />
    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. <br />
    4. 4.
    5. 5. http://www.sustainability.uconn.edu/sustain/biodiv/05.html<br />
    6. 6.
    7. 7. Biological invaders destroy habitats or out-compete native plants and animals.<br />Why should we care?<br />Invasive species costs Americans about $143 billion/year!<br />At least 30 new potential biological invaders enter the US every day…<br />
    8. 8.
    9. 9. Understanding Biological Invasions<br />
    10. 10. Definitions: Invasive Plants<br />“Weed”<br />Exotics<br />A plant growing where you do not want it.<br />(non-native)<br />Lots of beneficial species: Crops, pasture, forestry & ornamentals.<br />“Noxious”<br />A regulatory designation.<br />“Invasive”<br />Spreads outside of cultivation, and causes environmental& economic harm.<br />Natives<br />Co-evolution with other species, our natural heritage<br />
    11. 11. What makes a plant invasive?<br />Lack normal environmental constraints<br />Fast growth and reproduction<br />Highly adaptable a wide range of conditions<br />Often can transform their environment<br />Often encouraged by disturbance<br />Dominance = less biodiversity<br />
    12. 12. Key Stages in Plant Invasions<br />Escape<br />Lag Time<br />Invasion<br />Introduction<br />Cost<br />Area Infested<br />Time<br />
    13. 13. What does this mean for management?<br />People notice them here<br />Introduction<br />Detection: focus resources here<br />Prevention or Eradication(Inexpensive)<br />Local control and management only <br />(Expensive)<br />Area Infested<br />Control Costs<br /> Time<br />
    14. 14. How do we manage invasive plants?<br />Prevention<br />Quarantine before introduction<br />Monitoring & mapping<br />Chemical treatment (herbicides)<br />Biological controls (biocontrol)<br />Cultural treatment (hand pulling, cutting, etc.)<br />*<br />
    15. 15. Invasive Species of Horticultural Origin in Oregon<br />
    16. 16. Photo - knotweed <br />Japanese Knotweed: Fallopiapolystachyum<br />
    17. 17. Glenn Miller, ODA<br />Giant Knotweed: Polygonumsachalinese<br />
    18. 18. Photo - knotweed <br />Knotweed: Fallopiax bohemicum<br />
    19. 19. Photo - English ivy<br />English Ivy: Hedera helix<br />
    20. 20. Photos: Christine McDonald<br />Policeman’s Helmet: Impatiens gladulifera<br />
    21. 21. R. Emanuel, OSU <br />Parrot feather: Myriophyllumaquaticum<br />
    22. 22. Photo: Judy Scott, OSU<br />Yellow Flag Iris: Iris pseudacorus<br />
    23. 23. Lynn Ketchum, OSU EESC<br />Common Gorse: Ulexeuropaeus<br />
    24. 24. Photos: Michael L. Charters<br />Spanish Broom: Spartiumjunceum<br />
    25. 25. Scotch Broom: Cytisusscoparius<br />
    26. 26. French Broom: Genistamonspessulana<br />
    27. 27. Photo: Paul Wray, Iowa State University<br />Russian Olive: Elaeagnusangustifolia<br />
    28. 28. Photo: Wikimedia<br />Photo: EikeWulfmeyer<br />Old Man’s Beard, Travelers Joy: Clematis vitalba<br />
    29. 29. Old Man’s Beard: Clematis vitalba<br />
    30. 30. Spurge Laurel: Daphne laureola<br />
    31. 31. Photo – butterfly bush infestation in Lane Co.<br />Butterfly Bush: Buddlejadavidii<br />
    32. 32. Purple Loosestrife: Lythrumsalicaria<br />
    33. 33. Tree of Heaven: Ailanthus altissima<br />Photo: USFS<br />
    34. 34. Fennel: Foeniculumvulgare<br />
    35. 35. Photo: JohnathanJ. Stegeman<br />Bachelor’s button: Centaureacyanus<br />
    36. 36. Desert Indigobush: Amorphafruticosa<br />
    37. 37. Myrtle spurge: Euphorbia myrsintes<br />
    38. 38. Leafy spurge: Euphorbia esula<br />
    39. 39. Lynn Ketchum, OSU EESC<br />English Holly: Ilex aquilfolium<br />
    40. 40. But wait! There’s MORE!<br />
    41. 41. Salt Cedar: Tamarix spp.<br />
    42. 42. Photo: University of Georgia<br />Hydrillaverticillata<br />
    43. 43. Photo: Kurt W. Heckeroth<br />Petasites japonica var. giganteum<br />
    44. 44. Photos: WA State Weed Control Board <br />Yellow Archangel: Lamiastrumgaleobdolon<br />
    45. 45. Photos: King County , WA<br />Garden Loosestrife: Lysimarchiavulgaris<br />
    46. 46. Clary Sage: Salvia sclarea<br />
    47. 47. Photo: Robert Emanuel, OSU<br />Fragrant Water Lilly: Nymphaeaodorata<br />
    48. 48. Only you can prevent the invasion!<br />
    49. 49. What can Master Gardeners do?<br />Know thy enemy & teach others about them<br />Grow native & non-invasive wherever possible<br />Help others to do the same<br />Help the public with information on treatment<br />Monitor and report new invaders<br />Check clothes, vehicles, pets when out & about<br />
    50. 50. What can Master Gardeners do?<br />Don’t share unless you know it’s not invasive<br />Stay away from generic wildflower mixtures<br />Watch for hitchhikers in nursery stock<br />Use weed-free soil and mulch<br />Watch introductions for aggressive behavior<br />Don’t dump your yard clippings in the wild!<br />
    51. 51. If you have a known invasive (but can’t part with it)<br />Deadhead faithfully<br />Use root barriers<br />Dispose of plant material properly—bagged in the garbage or burned (completely)<br />Please don’t share your invader with others!<br />Contain it, control it, or cage it!<br />
    52. 52. For Water Gardeners<br />Always wash new introductions (think snails)<br />Keep water garden separate from native waters<br />Never dump water garden materials or water into native waters<br />Research your plants for invasive potential—many commonly used aquatics are!<br />
    53. 53. Some Resources<br />
    54. 54.
    55. 55. http://plants.usda.gov/java/noxiousDriver<br />
    56. 56.
    57. 57.
    58. 58.
    59. 59.
    60. 60.
    61. 61.
    62. 62.
    63. 63. Invasive Spp. Web Resources<br />Pacific Northwest Weed Management Handbook: weeds.ippc.orst.edu/pnw/weeds<br />Oregon Invasive Species Hotline:oregoninvasiveshotline.org/<br />National Invasive Species Clearinghouse: www.invasivespeciesinfo.gov<br />USDA PLANTS Database: plants.usda.gov/index.html<br />WA State Noxious Weed Board: www.nwcb.wa.gov/index.htm<br />Idaho Weed Awareness:idahoweedawareness.net/index.html<br />California Invasive Plant Council:www.cal-ipc.org <br />Be Plantwise:www.beplantwise.org/<br />
    64. 64. Questions?<br />Robert M. Emanuel<br />Water Resources & Community Development<br />Tillamook & Clatsop counties<br />2204 Fourth Street<br />Tillamook, OR 97141<br />(503) 842-5708 X 2 <br />robert.emanuel@oregonstate.edu<br />

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