Imperata cylindrica (L.) Raeusch. (ITIS)
First arrived accidentally in Louisiana in 1912, and it was introduced intentionally to Florida in the 1930s (Bryson and Carter 1993)
Forms dense stands that crowd out native species (Lippincott 1997)
USDA. Forest Service; Southern Regional Extension Forestry. Forest Health Program.
Cogongrass is one of the world's worst invasive weeds, and is firmly established in several southeastern states. A new fact sheet, Cogongrass Biology and Management in the Southeastern U.S., is now available that outlines identification, biology, and management options for cogongrass. If you see it, report it!
Distribution / Maps / Survey Status
Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Cogongrass.
Council or Task Force
USDA. APHIS. PPQ. Center for Plant Health Science and Technology; California Department of Food and Agriculture.
Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).
USDA. ARS. National Genetic Resources Program. GRIN-Global.
State and Local Government
Georgia Forestry Commission.
Cogongrass, Imperata cylindrica (L.), is considered the seventh worst weed in the world and listed as a federal noxious weed by USDA Animal and Plant Health Inspection Service - Plant Protection and Quarantine. Cogongrass infestations are being found primarily in south Georgia but is capable of growing throughout the state. Join the cogongrass eradication team in Georgia and be a part of protecting our state's forest and wildlife habitat. Report a potential cogongrass sighting online or call your local GFC Forester.
Mississippi Forestry Commission.
Florida Department of Agriculture and Consumer Services.
Alabama Forestry Commission.
Mississippi State University. Extension.
University of Arkansas. Cooperative Extension Service.
Clemson University (South Carolina). Regulatory Services.
University of Florida. IFAS. Center for Aquatic and Invasive Plants.
Bryson, C.T. and R. Carter. 1993. Cogongrass, Imperata cylindrica, in the United States. Weed Technology 7:1005-1009.
Dozier, H., J.F. Gaffney, S.K. McDonald, E.R. Johnson, and D.G. Shilling. 1998. Cogongrass in the United States: history, ecology, impacts, and management. Weed Technology 737-743.
Evans, H.C. 1987. Fungal pathogens of some subtropical and tropical weeds and the possibilities for biological control. Biocontrol News and Information 8:7-30.
Evans, H.C. 1991. Biological control of tropical grassy weeds, pp. 52-72. In: F.W.G. Baker and P.J. Terry (Eds.), Tropical Grassy Weeds. Wallingford, U.K.: CAB International.
Holm, L.G., D.L. Plucknett, J.V. Pancho, and J.P. Herberger. 1977. The world’s worst weeds: Distribution and biology. Honolulu, Hawaii: University Press of Hawaii.
Integrated Taxonomic Information System. Imperata cylindrica. [Accessed Sep 10, 2014].
Lippincott, C.L. 1997. Ecological consequences of Imperata cylindrica(cogongrass) invasion in Florida sandhill. PhD dissertation, University of Florida.
Moorehead, D.J., C.T. Bargeron, and G.K. Douce. 2007. Cogongrass distribution and spread prevention (PDF | 213 KB). In: N.J. Loewenstein and J.H. Miller (Eds.), Proceedings of the Regional Cogongrass Conference: A Cogongrass Management Guide (pp. 24-27). U.S. Forest Service.
Tabor, P. 1949. Cogongrass, Imperata cylindrica (L.) Beauv., in the southeastern United States. Agronomy Journal 41:270.