Invasive Species I.D. and Impacts

For comprehensive identification resources for Wisconsin’s 100+ regulated terrestrial plants, visit our Wisconsin Regulated Invasive Plant Identification Resource Page on the Renz Weed Science Website!

In 2023, WIFDN completed one-page factsheets to share the impacts of invasive species.

See links below:

Invasive species in parks factsheet

Invasive species management on roadsides and rights-of-way

Explore these sections on our page below to learn about identification and impacts of several invasive species in Wisconsin:

Terrestrial Plants

Aquatic Plants

Plant Diseases


Terrestrial Plants

Common NameĀ  Scientific Name Video Fact Sheet
Biennial thistles fact sheet
Bird’s-foot trefoil Lotus corniculatus fact sheet
Black locust Robinia pseudoacacia fact sheet
Black swallow-wort Vincetoxicum nigrum video fact sheet
Buckthorns fact sheet
Bush honeysuckles Lonicera sp. video fact sheet
Canada thistle Cirsium arvense video fact sheet
Common tansy Tanacetum vulgare video fact sheet
Creeping bellflower Campanula rapunculoides video fact sheet
Crown vetch Securigera varia video fact sheet
Dame’s rocket Hesperis matronalis video fact sheet
Field bindweed Convolvulus arvensis fact sheet
Garden valerian Valeriana officinalis video
Garlic mustard Alliaria petiolata video fact sheet
Goldencreeper Thladiantha dubia video
Hill mustard Bunias orientalis video fact sheet
Japanese barberry Berberis thunbergii video fact sheet
Japanese hedge-parsley Torilis japonica video fact sheet
Japanese honeysuckle Lonicera japonica fact sheet
Japanese hop Humulus japonicus video fact sheet
Japanese knotweed Polygonum cuspidatum video fact sheet
Japanese stiltgrass Microstegium vimineum video fact sheet
Leafy spurge Euphorbia esula video fact sheet
Lesser celandine Ranunculus ficaria video
Multiflora rose Rosa multiflora fact sheet
Olives Elaeagnus sp. fact sheet
Oriental bittersweet Celastrus orbiculatus fact sheet
Perennial pepperweed Lepidium latifolium video fact sheet
Poison hemlock Conium maculatum video fact sheet
Privet Ligustrum sp. fact sheet
Purple loosestrife Lythrum salicaria fact sheet
Quackgrass Elymus repens fact sheet
Sericea lespedeza Lespedeza cuneata fact sheet
Smooth bedstraw Galium mollugo video
Spiny plumeless thistle Carduus acanthoides video fact sheet
Spotted knapweed Centaurea stoebe video fact sheet
Sweetclovers Melolitus sp. fact sheet
Teasels Dipsacus sp. video fact sheet
Tree-of-heaven Ailanthus altissima video fact sheet
Wild chervil Anthriscus sylvestris video fact sheet
Wild parsnip Pastinaca sativa video fact sheet

Phragmites management in Wisconsin
Callery (Bradford) Pear
Biocontrol of purple loosestrife
Eradication of common barberry in Wisconsin
Using native plants in your home garden
Impacts of bush honeysuckles
New and priority terrestrial plants

Aquatic Plants

Invasive Aquatic Plants Introduction: video
Water Hyacinth (Eichhornia crassipes), Water Lettuce (Pistia stratiotes), & Parrot Feather (Myriophyllum aquaticum): video
Eurasian Watermilfoil (Myriophyllum spicatum): video
Starry Stonewort (Nitellopsis obtusa): video
New and priority aquatic plants

Plant Diseases

Plant diseases that are impacting or have the potential to impact natural areas and native vegetation:

Plant Disease Video Fact Sheet
Aster yellows video fact sheet
Boxwood blight video
Dutch elm disease video fact sheet
Impatiens downy mildew video fact sheet
Late blight fact sheet
Powdery mildews video fact sheet
Southern blight video fact sheet
Tar spot video fact sheet
Thousand cankers disease video fact sheet
Tobacco mosaic video
Tobacco rattle video fact sheet
Tomato chlorotic dwarf video
Verticillium wilt video fact sheet

Impacts of late blight
New and priority plant diseases


Terrestrial Animals

New and priority invasive insects

Brown Marmorated Stinkbug in Wisconsin: video

Purple Carrot Seed Moth: video

Emerald Ash Borer (Agrilus planipennis)

Gypsy Moth

  • Impacts and history of gypsy moth in Wisconsin: video

Jumping Worm (Amynthas sp.)

Feral Pigs (Sus scrofa)

Aquatic Animals

New and priority aquatic fish and invertebrates
Spiny water flea economics: video
Impacts of Sea Lamprey in the Great Lakes

Impacts of Invasive Species

Invasive species as drivers and passengers of ecological change: video
Causes and consequences of exotic plant invasions

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