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ARS Home » Plains Area » Miles City, Montana » Livestock and Range Research Laboratory » Research » Publications at this Location » Publication #348183

Research Project: Adaptive Rangeland Management of Livestock Grazing, Disturbance, and Climatic Variation

Location: Livestock and Range Research Laboratory

Title: Example of a broad-scale study of weed suppressive bacteria from Montana rangelands [Abstract]

item Reinhart, Kurt

Submitted to: Society for Range Management Meeting Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 12/1/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: • Problems- Cheatgrass (Bromus tectorum) is an annual exotic grass that covers millions of acres in the western USA and threatens regional rangelands. Some bacteria (Psuedomonas fluorescens D7 and ACK55) isolates have been reported to effectively control cheatgrass in portions of the Great Basin. Nothing is known about the efficacy of such weed suppressive bacteria in either the Northern Great Plains or Middle Rocky Mountain ecoregions. • Accomplishments- Results of a coordinated distributed experiment indicate no appreciable control of cheatgrass or Japanese brome after applying Psuedomonas fluorescens ACK55 in 2014 across eight sites (7 in Montana and 1 in Wyoming). • Management implications- We found no evidence that P.f. ACK55 is likely to control either cheatgrass or Japanese brome in the studied ecoregions.