Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (112 KB bytes)

Title: Right-of-way management: A key to controlling the spread of cogograss (Imperata cylindrica)

Author: Faircloth, W.H.; Patterson, M.G.; Miller, James H.; Teem, D.H.;

Date: 2004

Source: In: Proceedings of the Southern Weed Science Society, Memphis, TN, January 26-28, p. 311-312

Publication Series: Miscellaneous Publication

Description: Cogongrass [Imperata cylindrica(L.) Beauv.] is an undesired species on highway rights-of-way (ROWS) due to its displacenent of native and/or more manageable grasses, unsightly growth characteristic, and propensity for fire. Fire not only poses a danger to motorists but could cause property loss to adjoining landowners. Most importantly, ROWS provide corridors to un-infested areas, therefore, expanding the range of this noxious weed. In order to protect natural systems and un-infested areas, ROW management of cogongrass is crucial. Two projects were located on Interstate 10 ROW in Baldwill Co., near the towns of Loxley (est. fall 2000) and Malbis (est. fall 2001). Both projects integrated chemical control with the subsequent revegeration of highly competitive and more desirable species. Herbicides were glyphosate (3.0 lb ai/A) and imazapyr (0.375 and 0.75 lb ai/A). Repacement species were bahiagrass (Paspalum notatum var. Pensacola), common bermudagrass (Cynodon dactylon), browntop millet (Panicum ramosum), crimson clover (Trifolium incarnatum var. AU Robin), and annual ryegrass (Lolium multiflorum var. Gulf). Treatments were comprised of various combimations of herbicides and replacement species arranged in an RCB design with 4 replications. The initial study located at Loxley had 14 treatments plus an untreated control; the Malbis study consisted of 7 treatments plus an untreated control. Two differences in plot maintenance practices existed between locations: 1) p1ots at Loxley were not mowed during the growing season, and 2) all replacement species were broadcast-seeded. The study at Malbis was designed to more closely follow Alabama 1)Department of Transportation protocols, therefore, plots were mowed 4x during the growing season (May-June, July, Aug.-Sept., and Nov.) and all replacement species were drill-seeded. Plots were 15x30 ft. at both locations. Both studies were designed in triplicate, such that a time factor could be examined. All regimes were treated year one; two of three were re-treated in year two; a third was treated yet again in year three. Thus, all treatments could be evaluated when implemented in one, two, and three successive years. Plot evaluation included visual ratings of cogongrass control and subsequent revegeration, cogongrass stand counts, and cogongrass biomass sampling. Plots were evaluated yearly beginning one year after initial treatment (YAIT).

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Faircloth, W.H.; Patterson, M.G.; Miller, James H.; Teem, D.H. 2004. Right-of-way management: A key to controlling the spread of cogograss (Imperata cylindrica). In: Proceedings of the Southern Weed Science Society, Memphis, TN, January 26-28, p. 311-312


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.