Invasive Species

• Invasive Exotic Shrub Honeysuckles - Major Threats to Midwestern Woodlands
  Since their introduction to North America as ornamentals in the mid-18th and 19th centuries, exotic honeysuckles have spread rapidly, crowding out native plant species and changing the face of the landscape. This booklet describes these nuisance shrubs, their effect on natural communities and methods for controlling their spread.
  inv.honeysuckle.pdf (640 KB) (FR-448-2009)
  
  
  
• Common and Glossy Buckthorn, Major Threats to Midwestern Woodlands
  A brochure that explains the threat of buckthorn, with information on identification and control methods.
  inv.buckthorn.pdf   (1.3 MB) (FR-216)
  
  
  
• Japanese Knotweed, A New Threat to Wisconsin's Waterways, Lakeshores and Wetlands
  A brochure that explains the threat of Japanese knotweed, with information on identification and control methods.
  inv.knotweed.pdf (1.85 MB) (ER-657)
  
  
  
• Purple Loosestrife
  A pamphlet that identifies and explains the threat of purple loosestrife in wetlands and waterways.
  inv.purple.pdf (2.47 MB) (WI-799-2004)
  
  
  
  
  

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Wisconsin Department of Natural Resources I Wisconsin Natural Resources Conservation Service

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