In recent decades invasive plants have become a major threat to natural areas in the Midwest. The natural, agricultural and urban environments have been altered by exotic and invasive species. These species were, and still are, introduced for both intentional and accidental reasons. These plants cost taxpayers billions of dollars per year and continually degrade our precious natural areas.
Most invasive species are opportunistic colonizers that, once introduced, quickly establish themselves in disturbed plant communities. Invasive species displace native flora due to faster growth rates, excessive seed production and greater tolerance of a wide range of growing conditions. Invasive species also lack the natural predators of their homeland that normally would keep them ’in check’.
Invasive species control requires an approach customized for each specific site. Several control methods are possible depending on the invasive plants present, timing, budget and overall site goals.
Major Invasive Species of Northwest Illinois
- Garlic Mustard (Allaria petiolata)
- Honeysuckle (Lonicera tatarica)
- Multiflora Rose (Rosa multiflora)
- Box Elder (Acer negundo)
- Brome Grass (Bromus spp.)
- Crown Vetch (Coronilla varia)
- Teasel (Dipsacus spp.)
- Thistle (Cirsium spp.)
- Wild Parsnip (Pastinaca sativa)
- Canada Goldenrod (Solidago canadensis)
- Red Cedar (Juniperus virginiana)
- Buckthorn (Rhamnus cathartica)
- plus many more
