Landowners and invasive species managers prioritize their activities to make efficient use of limited time and resources. The Lake St. Clair Cooperative Invasive Species Management Area maintains a Tiered Priority Invasive Species List that is reviewed annually by the Early Detection & Rapid Response (EDRR) Committee. See the list below to learn more about what invasive species we're watching for and managing.

The LSC CISMA prioritizes outreach, education, and management of certain invasive species with high potential for negative impacts. These include: invasive Phragmites, Black Swallow-wort, Pale Swallow-wort, Japanese Knotweed, Giant Knotweed, European Frog-bit, and Flowering Rush. The CISMA is also on high alert for state watch list species like Spotted Lanternfly, Red Swamp Crayfish, and Water Lettuce.

LSC CISMA Tiered Priority Invasive Species List (December 2020)

I) Priority Species for Survey, Treatment & Education

  • European frogbit (Hydrocharis morsus-ranae)

  • Knotweeds:

    • Japanese (Fallopia japonica)

    • Giant Polygonum sachalinensis (Fallopia sachalinensis)

    • Bohemian knotweeds

  • Phragmites (Phragmites australis)

  • Red Swamp Crayfish (Procambarus clarkii)

  • Swallowworts:

    • Pale Cynanchum rossicum (Vincetoxicum rossicum)

    • Black Cynanchum louiseae (Vincetoxicum nigrum)

  • Wild Parsnip (Pastinaca sativa)

II) Priority Species for Early Detection & Rapid Response

  • Asian Longhorned Beetle (Anoplophora glabripennis)

  • Beech bark disease (Cryptococcus fagisuga + Neonectria spp.)

  • Chinese yam (Dioscorea oppositifolia L.)

  • Japanese stiltgrass (Microstegium vimineum (Trin.) A. Camus)

  • Kudzu (Pueraria montana var. lobata)

  • Mile-a-minute weed (Persicaria perfoliata)

  • New Zealand mud snail (Potamopyrgus antipodarum)

  • Oak wilt (Bretziella fagacearum)

  • Spotted Lanternfly (Lycorma delicatula) & Tree of heaven (Ailanthus altissima)

  • Water lettuce (Pistia stratiotes)

III) Priority Species for Continued Education

  • Balsam wooly adelgid (Adelges piceae)

  • Brazilian elodea (Egeria densa)

  • Invasive carp (Hypophthalmichthys spp, Mylopharyngodon piceus, Ctenopharyngodon idella)

  • Hemlock wooly adelgid (Adelges tsugae)

  • Himalayan balsam (Impatiens glandulifera)

  • Hydrilla (Hyrdrilla verticillata)

  • Thousand cankers disease (Geosmithia morbida)

  • Water chestnut (Trapa natans)

  • Water hyacinth (Eichhornia crassipes)

IV) Common Invasive Species for Land Owner BMP Education & Stewardship

  • Autumn-olive (Elaeagnus umbellata)

  • Black locust (Robinia pseudoacacia)

  • Common buckthorn (Rhamnus cathartica)

  • Dames rocket (Hesperis matronalis)

  • Eurasian watermilfoil (Myriophyllum spicatum)

  • Flowering rush (Butomus umbellatus)

  • Garlic mustard (Alliaria petiolata)

  • Glossy buckthorn (Rhamnus frangula or Frangula alnus)

  • Honeysuckles (Lonicera spp.)

  • Japanese barberry (Berberis thunbergii)

  • Multiflora rose (Rosa multiflora)

  • Oriental bittersweet (Celastrus orbiculatus)

  • Purple loosestrife (Lythrum salicaria)

  • Privet (Ligustrum vulgare)

  • Spotted knapweed (Centaurea stoebe)

  • Starry stonewort (Nitellopsis obtusa)