Methods of controlling invasive plants in streamside areas

1. Controlling Invasive Plants

4. Can you name these six invaders?

5. Photo - Himalayan blackberry

6. Photo - Himalayan blackberry Himalayan blackberry ( Rubus armeniacus )

7. Photo - English ivy

8. Photo - English ivy English ivy ( Hedera helix )

9. Photo - knotweed

10. Photo - knotweed Knotweed ( Polygonum x bohemicum )

11. Photo - knotweed

12. Photo - knotweed Knotweed ( Polygonum polystachyum )

13. Photo - butterfly bush

14. Photo - butterfly bush Butterfly Bush ( Buddleia davidii )

15. Photo - yellow flag iris

16. Photo - yellow flag iris Yellow flag iris ( Iris pseudacorus )

17. Photo - reed canarygrass

18. Photo - reed canarygrass Reed canarygrass ( Phalaris arundinacea )

19. What do these plants have in common?

23. Photo – knotweed infestation in Lincoln Co. Oregon Department of Agriculture Knotweed infestation in Lincoln County, OR

24. Photo – knotweed infestation in Clackamas Co. Japanese Knotweed ( Polygonum cuspidatum ) Knotweed infestation in Clackamas County, OR The Nature Conservancy

25. Photo – knotweed infestation in Clackamas Co. Knotweed infestation in Clackamas County, OR The Nature Conservancy

26. Photo - butterfly bush infestation in Lane Co. Butterfly bush infestation in Lane County, OR

27. Photo – butterfly bush infestation in Lane Co. Butterfly bush infestation in Lane County , OR

28. Photo – butterfly busy infestation in Lane Co. Butterfly bush infestation in Lane County, OR

29. Photo – yellow flag iris infestation in Cowlitz Co., WA Yellow flag iris infestation in Cowlitz County, WA

30. Photo – yellow flag iris infestation in Cowlitz Co., WA Yellow flag iris infestation in Cowlitz County, WA

39. Controlling Himalayan Blackberry

40. Photo - blackberries invading a creek in Yamhill Co. Blackberries invading a creek in Yamhill County, OR

45. Controlling English Ivy

46. Photo – English ivy infestation in Yamhill Co. English ivy infestation in Yamhill County, OR Yamhill Soil and Water Conservation District

47. Photo – English ivy infestation in Yamhill Co. English ivy infestation in Yamhill County, OR Yamhill Soil and Water Conservation District

48. Photos – English ivy mature form English Ivy Mature Form

49. Photos – black walnut tree covered by English ivy English Ivy 2002 2006

50. No Ivy League website home page http://www.portlandonline.com/parks/index.cfm?c=47820

53. Photos – “lifesaver” method of English ivy control “ Lifesaver” for a Tree With English Ivy

54. Photos – “lifesaver” method of English ivy control “ Lifesaver” for a Tree With English Ivy

57. Controlling Knotweed

58. Photo – knotweed infesting the upper Skykomish River, WA Knotweed infesting the Upper Skykomish River, WA King County Noxious Weed Program

59. Photo – knotweed stems, leaves and flowers Knotweed ( Polygonum cuspidatum )

60. Photo – knotweed leaves, 3 species comparison Japanese Himalayan Giant

61. Photo – knotweed stems Knotweed ( Polygonum x bohemicum )

62. Photo – knotweed rhizome system exposed on a bank Japanese Knotweed ( Polygonum cuspidatum ) The Nature Conservancy Knotweed rhizomes exposed on a river bank

63. Photo – knotweed infestation in winter Seattle Public Utilities Knotweed stems in winter

65. Geotextile Fabric Woven Seattle Public Utilities Non-Woven

66. Photos – install fabric very loosely Seattle Public Utilities Geotextile Fabric Too tight – plants break through Seattle Public Utilities Loose fabric – allows growth Under It

68. Photo – knotweed stem injection Knotweed stem injection

70. Controlling Butterfly Bush

71. Photo – butterfly bush dominating riparian habitat in Washington Washington State Noxious Weed Control Board Butterfly bush dominating riparian habitat in Washington

75. Controlling Yellow Flag Iris Washington State Noxious Weed Control Board

79. Controlling Reed Canarygrass

80. Photos – reed canarygrass Reed Canarygrass ( Phalaris arundinacea )

81. Photos – reed canarygrass Reed Canarygrass ( Phalaris arundinacea ) Inflorescence – Emerging and Fully-opened Collar Region With Ligule

82. Photo – reed canarygrass infesting a creek in Yamhill Co. Reed canarygrass infestation in Yamhill County , OR

86. What is being done about invasive plants in Oregon?

88. ODA noxious weed website giant knotweed profile http://oregon.gov/ODA/PLANT/WEEDS/profile_giantknotweed.shtml