Hdgi Invasive Spp 2 8 10
1 like499 views
This document provides an overview of invasive species for green industry professionals. It defines invasive species and explains why they are problematic, costing Americans $143 billion per year. Several invasive plants that are issues in Oregon are described, including knotweed, butterfly bush, yellow flag iris, and tamarisk. The document recommends actions professionals can take to prevent the spread of invasives, such as using weed-free materials, properly disposing of plants, and educating clients. Resources for identifying and managing invasive species are also provided.
Hdgi Invasive Spp 2 8 10
- 1. Invasive Species 101: Primer for Green Industry Professionals Robert Emanuel, Ph.D. Water Resources and Community Development Faculty, Tillamook and Clatsop counties
- 3. Invasive species means an alien species whose introduction does or is likely to cause economic or environmental harm or harm to human health.
- 7. 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…
- 10. 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.
- 12. Key Stages in Plant Invasions Escape Lag Time Invasion Introduction Area Infested Cost Time
- 13. 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
- 20. Photo – butterfly bush infestation in Lane Co. Butterfly Bush: Buddleja davidii
- 21. Photo ‐ butterfly bush infestation in Lane Co. Butterfly Bush (Buddleia davidii) Photo: OSU
- 29. Photo ‐ knotweed Knotweed: Fallopia x bohemicum
- 34. Photo: Paul Wray, Iowa State University Russian Olive: Elaeagnus angustifolia
- 43. Eric Coombs, ODA Eric Coombs, ODA Mediterranean sage: Salvia aethiopis
- 44. Eric Coombs, ODA
- 54. BS Thurner Hof
- 77. Photo: University of Georgia Herb Robert: Geranium robertianum
- 83. 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
- 84. 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
- 85. 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
- 86. Commercial Wildflower or Plant Border Mixes (AKA “Meadow in a Can”)
- 87. 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!
- 89. Some Resources
- 99. People and Organizations Brooke Gray Eastern Oregon EDRR Coordinator, Weed Educator: 541‐447‐6228 Dan Sherwin, Deschutes County Vegetation Manager, dansh@co.deschutes.or.us , 541‐322‐7135 Local Soil and Water Conservation Districts OSU Extension Service offices in each county