What nuisance species in Kentucky pose the most serious threat?

source & additional information:
https://fw.ky.gov/More/Pages/Nuisance-Species-Plans.aspx

The Kentucky Exotic Plant Council lists the following species as “severe threats” in Kentucky:

  • Ailanthus altissima  – Tree-of-heaven
  • Alliaria petiolata – Garlic mustard
  • Carduus nutans  – Musk thistle
  • Celastrus orbiculata – Oriental bittersweet
  • Conium maculatum – Poison hemlock
  • Coronilla varia – Crown vetch
  • Dioscorea oppositifolia – Chinese yam
  • Elaeagnus umbellata – Autumn olive
  • Euonymus alatus – Winged euonymus, burningbush
  • Euonymus fortunei – Winter creeper
  • Festuca arundinacea (Lolium arundinaceum) – Kentucky 31 fescue
  • Lespedeza cuneata – Sericea lespedeza
  • Ligustrum sinense, L. vulgare – Privet
  • Lonicera japonica – Japanese honeysuckle
  • Lonicera maackii, L. morrowi, L. tatarica – Bush honeysuckle, Morrow.s, tartarian h.s.
  • Lythrum salicaria – Purple loosestrife
  • Melilotus alba – White sweet clover
  • Melilotus officinalis – Yellow sweet clover
  • Microstegium vimineum – Japanese grass
  • Miscanthus sinensis – Chinese silver grass
  • Phragmites australis – Common reed
  • Polygonum cuspidatum – Japanese knotweed
  • Pueraria lobata – Kudzu
  • Rosa multiflora – Multiflora rose
  • Sorghum halapense – Johnson grass
  • Stellaria media – Chickweed