Noxious and Selected Invasive Plant Populations along Illinois Toll Highway Rights-of-Way

Abstract

• Repeated a 2010 survey for selected invasive species and listed noxious weeds throughout the ISTHA corridor. • Mapped 1345 populations of invasive species. • Found the ISTHA corridor to be heavily populated by invasive species throughout the length of each roadway. • Most frequently found species were Canada Thistle (Cirsium arvense) and Cut-leaf Teasel (Dipsacus laciniatus). • Recommend management specific to each of 8 species or groups of species found during the survey.Illinois State Toll Highway Authorityunpublishednot peer reviewedOpe