Yellow Star Thistle

Undesired plants or weeds are a challenge for farmers and gardeners alike. Find information about weeds and how to control them.

Invasive and Noxious Weeds

USDA. Natural Resources Conservation Service.

Compiles and provides information about Federal and State Noxious Weed Lists, and weeds and introduced plants found in the United States by scientific and common name.


U.S. Bureau of Land Management. Office of Public Affairs.

Information about the management of weeds on public lands.

Noxious Weeds Program

USDA. Animal and Plant Health Inspection Service.

Information about activities to prevent the introduction of non-native invasive plants and the spread of newly introduced invasive plants within the United States.

Development of Plant Pathogens as Bioherbicides for Weed Control

Purdue University. Department of Botany and Plant Pathology.

A look at a historic, multistate research project (S-1001), and its predecessors, the build the foundation for "research and evaluation of nearly two dozens of pathogens as potential bioherbicides. These projects have also helped to develop epidemiological and risk-analysis models to understand the performance and safety of previously registered and commercialized bioherbicidal pathogens."

Organic Weed Management

Cornell University. Weed Ecology and Management Laboratory.

Information about major weeds, and weed management techniques for organic production.

PNW Weed Management Handbook

Oregon State University.

A handbook of weed control including integral weed management and biological control.

Integrated Noxious Weed Management after Wildfires

Montana State University-Bozeman. Cooperative Extension Service.

Information about managing burned areas by enhancing desired species while controlling noxious weeds.