False Brome Working Group

False Brome Working Group

The False Brome Working Group is dedicated to education and outreach, developing control measures, and identifying research needs for false brome in North America. We are made up of representatives from various federal and state agencies, as well as private and non-profit groups. Our overall goal is the containment and eventual elimination of this pest plant.

A partnership of:

  • USDA Forest Service
  • USDI Bureau of Land Management
  • Oregon Department of Agriculture
  • US Army Corps of Engineers
  • OSU College of Forestry
  • Institute for Applied Ecology
  • Starker Forests Inc.
  • The Nature Conservancy
  • Native Plant Society of Oregon

What is False Brome?

False brome (also known as slender false brome, Brachypodium sylvaticum) is a non-native grass species invading habitats in western Oregon and California. It is listed as a noxious weed by the Oregon Department of Agriculture.

Download a 2-page information sheet on false brome identification, threats, and control

To learn about prevention and control, as well as sample contract language, management plans and much more, download this 2004 summary!

The following links also provide information on false brome biology, control, and spread:


Report infestations to the Oregon Invasives Hotline: Report infestation

2011 Workshop Presentations

Workshop on the Ecology, Management and Control of False-brome in the Willamette Valley

Held March 11, 2011 at the Corvallis Public Library Meeting Room in Corvallis, OR.


Recreation and false-brome

  • Download a simple poster that informs recreationalists about false brome 
  • Download a detailed recreation poster. Please contact us if you would like a copy of this poster in a different format which you can modify for your resource area. (Fall 2003)

Controlling false-brome

Efficacy of false brome treatmentsClick here to open a table describing the efficacy of a number treatments, including physical, chemical, biological control, and integrated pest management.

The following are some cautions from Glenn Miller with the Oregon Department of Agriculture about some specific herbicide formulations:

  • Habitat (brand name): Ineffective at controlling false brome.
  • Aquamaster/Rodeo: 12 to 24 hours of drying time required in order for herbicide to be effective. Other formulations of Roundup with different surfactants do not appear to have the same drying issue as Rodeo.


False brome is currently concentrated on the west-side of the Oregon Cascades. It is found in forests and foothhills near Corvallis and Eugene, as well as the Cascade Ranges east and northeast of Eugene. Isolated populations have appeared in northern and southern Oregon, along the Pacific Coast, and at the headwaters of the Metolious River on the east-side of the Cascades. The plant appears to be expanding rapidly.

False brome has also been identified in Virginia and Bergen Swamp, Genesee County, New York (2009).

Click on map at left for a larger version. Map produced and provided by the Willamette National Forest.

Predicted distribution

A preliminary habitat model map (guestimate) to show where there is high and low vulnerability for false-brome to establish and where it is uncertain due to lack of data was recently developed by Cindy McCain, Noel Bacheller, and Aimee Lesieutre (Siuslaw National Forest) and others. The model is largely based on potential natural vegetation, temperature and precipitation, as well as some expert opinion.

Click here for map of predicted distribution based on habitat model.

False-brome in Oregon

Click here to download archived information on false brome in the OSU Research Forest-Blodgett Tract. This was prepared for an April 2004 field trip.

False brome in California

An outbreak of false brome was first documented in the Santa Cruz mountains of California in December of 2003.  Click here to read more about false brome in California.

Other useful links and downloads

False brome Working Group meeting notes/newsletter:

Herbicide studies:

Grazing study PowerPoint presentation:

Regional population genetics:

Habitat studies: