This manual summarizes the morphological characteristics, habitat requirements, life history, and possible methods of control for several common invasive plant species. Botanical terms used in the plant descriptions are not available on-line at this time. A reference section is included to acknowledge sources of information and to provide a reference to the literature addressing the problem of invasive species in Wisconsin. Sources for weed control tools, organizations, and other useful information are included in this section. Recommendations included here are limited to the control of some of the more problematic invasive plant species of Wisconsin. As control information on additional invasive species becomes available, and as users request information on other problem plants, these species may be added to the manual.