1. INVASIVE SPECIES OF DELAWARE
Kerry Britton, USDA Forest Service,
Yikes! They’re everywhere!

2. Introduced Species Non-native species (alien, exotic)
Some can become invasive, spreading throughout their new area.
Are difficult to control

3. Why did we bring them?

4. For food…

5. ‘cuz they’re purdy…
Gregg Hill Gardens

6. for medicine…
Chamomile (Matricaria recutita)

7. or some other use. Fiber Erosion control Conservation projects
Daniel Barringer/Natural Lands Trust
Crownvetch (Coronilla varia)
Fiber
Erosion control
Conservation projects
Multiflora Rose (Rosa multiflora)
James H. Miller, USDA Forest Service,
USDA-APHIS PPQ Archives,
Gypsy moth (Lymantria dispar)

8. Or just by accident!
Zebra Mussels introduced from ballast water

9. Invasive species… Can grow in many conditions
Grow, mature and reproduce quickly
Can survive and reproduce in harsh conditions
Have roots and rhizomes that store large amounts of food
Lack natural predators, parasites and diseases

10. Kudzu, or Mile-a-Minute
Was introduced in 1876 from Japan at the Centennial Exposition in Philadelphia to celebrate different cultures
Gardeners grew it for ornamental purposes
Was used for erosion control
Now used to feed goats and to make baskets
Yun Wu, USDA Forest Service,
Kerry Britton, USDA Forest Service,

11. Purple Loosestrife Brought from Europe to plant in gardens
USDA
Brought from Europe to plant in gardens
Competes with wetland plants
John M. Randall/The Nature Conservancy

12. Multiflora Rose Brought here from Asia in the 1800s
Was used as a living fence and for erosion control
James H. Miller, USDA Forest Service,
James H. Miller, USDA Forest Service,

13. Tree of Heaven
Lisa L. Smith
Lisa L. Smith

14. Garlic Mustard…yum!
Victoria Nuzzo, Natural Area Consultants,
Tennessee - EPPC

15. Oriental Bittersweet USDI - National Park Service
Daniel Barringer/Natural Lands Trust

16. Japanese Stiltgrass Barry A. Rice/The Nature Conservancy
John M. Randall/The Nature Conservancy

17. Nutria Don’t let this cute little guy fool you!
Introduced for the fur trade
Damages vegetation and destroys wetland habitats

18. The plant Mrs. Nowak hates more than any other…Phragmites!!!
John M. Randall/The Nature Conservancy

19. Also known as the common reed
James R. Allison, GA Dept. of
Natural Resources,
James H. Miller, USDA Forest Service,

20. Problems with Invasive Species
Change the food web
Reduce biodiversity
Degrade habitats
Transmit exotic diseases and parasites
Cost to economy