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You are here: Home / Plants / Management / Control / Decision Support Tools

Decision Support Tools

Covers risk assessments, ranking systems, and other decision-making tools for invasive plant species. See Manager's Tool Kit - Decision Support Tools for general resources and other species.

Council or Task Force

Ohio Invasive Plant Assessment Program
Ohio Invasive Plants Council.


Guidelines for Coordinated Management of Noxious Weeds: Development of Weed Management Areas
DOI. Bureau of Land Management and National Park Service; USDA. Forest Service.
Cooperative effort between Bureau of Land Management, Forest Service, National Park Service, Montana Department of Agriculture, Idaho Department of Agriculture, Park County, Wyoming Weed & Pest Control District and Ag West Communications

iMapInvasives - Invasive Plant Management Decision Analysis Tool (IPMDAT)
Nature Conservancy. iMapInvasives.
The IPMDAT was created by a team of scientists from New York chapters of The Nature Conservancy to help land stewards make strategic decisions about invasive species control projects.

Invasive Species (I-Rank) Assessments
NatureServe Explorer.
Includes assessments for a total 452 non-native plants of the U.S., searchable by name, location, invasive impact rank (I-Rank), or a combination of these criteria. The assessments are the result of applying a systematic protocol (2004; PDF | 1.03 MB) to determine the degree of impact an individual non-native species has on the native plants, animals, and ecosystems of the United States.
Note: The invasive species ranks (I-Ranks) are on the Status tab. Use the link at the top of the Status tab that says "U.S. Invasive Species Impact Rank (I-RANK)" or just scroll down the page until you see the I-Rank select criteria. You can search for individual species by name, by location or search by the overall invasive impact rank.

New York Invasive Species Information - Non-Native Plant Assessments
New York Invasive Species Clearinghouse.
A system/protocol designed to assess the invasive nature of non-native plant species was developed by The Nature Conservancy (TNC) in New York and the Brooklyn Botanic Garden (BBG) in 2008.

Weed Control Methods Handbook: Tools and Techniques for Use in Natural Areas (Apr 2001)
Archive from the Nature Conservancy, Global Invasive Species Team. By Mandy Tu, Callie Hurd, & John M. Randall. See also: Templates and Planning Examples

Pacific Island Ecosystems at Risk (PIER)
USDA. FS. Institute of Pacific Islands Forestry.
The U.S. Forest Service is pleased to announce the release of version 5.1 of the Pacific Island Ecosystems at Risk (PIER) web site and CD (Nov 2006). Over 5000 herbarium records from the Bishop Museum have been added to the location data. PIER now contains profiles of 1270 plant species, over 3000 photos and images, and over 600 risk assessments to aid in identifying and evaluating invasive plant species of concern to the Pacific region.

Weed Risk Assessments for Florida for The Nature Conservancy
Hawaiian Ecosystems at Risk Project.
Weed risk assessments for Florida based on the Australia/New Zealand Weed Risk Assessment model were created for The Nature Conservancy by Doria Gordon et al. for 260 species.

International Weed Risk Assessment Workshop
Hawaiian Ecosystems at Risk (HEAR) Project.
Disseminates information generated from workshop sessions; includes proceedings, papers, and other information resources.

Hawai'i-Pacific Weed Risk Assessment (HPWRA)

Federal Noxious Weed Disseminules of the U.S.
USDA. Animal and Plant Health Inspection Service; California Department of Food and Agriculture.

This interactive tool provides photographs, text and keys that aid in determining whether or not an unknown disseminule (e.g., seed, fruit) found as a contaminant in imported botanicals and agricultural products is a Federal Noxious Weed (FNW) and is therefore actionable. Fact Sheets for each FNW taxon pull together relevant descriptions, including distinguishing characteristics and photographs.

Guidelines for Weed-Risk Assessment in Developing Countries
UN. Food and Agriculture Organization.

Federal Government

Conservation Benefits of Rangeland Practices: Assessment, Recommendations, and Knowledge Gaps (2011)
USDA. Natural Resources Conservation Service.
The rangeland literature synthesis provides an unprecedented source of evidence-based information to guide the development and assessment of management practices and conservation programs on the nation's rangelands.
See also: Chapter 7. Invasive Plant Management on Anticipated Conservation Benefits: A Scientific Assessment (PDF | 3.3 MB)

Noxious Weeds Program: Environmental Documents
USDA. APHIS. Plant Protection and Quarantine.

Plant Health Environmental Assessments
USDA. APHIS. Plant Protection and Quarantine.
Provides plant protection and quarantine environmental documents for various species.

Noxious Weed Program Risk Assessments
USDA. APHIS. Plant Protection and Quarantine.

See also: Background Information on the PPQ Weed Risk Assessment Process and Products (Apr 2012; PDF | 359 KB)

Invasiveness Ranking System for Non-Native Plants of Alaska (Aug 2008; PDF | 5.9 MB)
USDA. FS. Alaska Region.

Preventing and Managing Invasive Plants - Record of Decision (Oct 2005; PDF | 863 KB)
USDA. FS. Pacific Northwest Region.
See also: Pacific Northwest Region - Invasive Plants for more resources

International Government

Biosecurity - Plant Risk Analyses
Australian Government. Department of Agriculture and Water Resources.
Policies that allow for the safe importation of plant and plant products.

State Government


IFAS Assessment of Non-Native Plants in Florida's Natural Areas
University of Florida. IFAS. Center for Aquatic and Invasive Plants.
See also: The UF/IFAS Assessment of Nonnative Plants in Florida's Natural Areas: History, Purpose, and Use (Electronic Data Information Source Publication #SS-AGR-371)

Weed Risk Assessments for Hawaii and Pacific Islands
University of Hawai'i - Manoa.


Risk Assessment for Invasive Plant Species
Weed Science Society of America.
Weed Technology: Vol. 18, No. 5, pp. 1305-1308.
Note: Abstract; full article requires subscription

Plant Stewardship Index (PSI)
Pennsylvania Land Trust Association.
The Plant Stewardship Index is a standardized assessment tool that calculates a numerical index reflecting the quality of native plant communities for a given area. It indicates the impacts of invasive plants and can also be used to monitor the efficacy of land management practices.

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Last Modified: Sep 22, 2018
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