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Studies show integrated strategies work best for buffelgrass control


Buffelgrass is a drought-tolerant, invasive weed that threatens the biodiversity of native ecosystems in the drylands of the Americas and Australia. Unfortunately, though, land managers trying to control the weed often experience mixed results.

To shed new light on buffelgrass and the best techniques to use for its control, researchers from the University of Arizona conducted a literature review that is featured in vol. 12 issue 4 of the journal Invasive Plant Science and Management.

Farrell and Gomish IPSM Volume 12 issue 4

Credit: WSSA

The authors synthesized the results from 229 studies conducted on several continents and in a variety of ecosystems. Among their findings:

  • The most effective buffelgrass control is achieved when multiple techniques are used in tandem and when follow-up treatments are applied. For example, fire might be used to destroy adult plants, followed by herbicide applications or the manual removal of new seedlings.
  • Buffelgrass takes advantage of environmental conditions to compete against native species. For example, it can access water deeper in the soil profile for longer into the dry season and can take advantage of nutrients and space made available after wildfires or other disturbances. As a result, land managers may want to focus on restoration of drought-tolerant native species that can compete effectively under the same conditions.
  • The long-term impact of buffelgrass treatments on native plants and ecosystems is poorly understood. The authors suggest the need for additional research to explore the issue.

"Our review highlights the value of integrated weed management programs," says Hannah Farrell, PhD student and lead author. "Herbicides or other treatments used in isolation are uniformly less effective in controlling buffelgrass than those used in tandem with other approaches."

The article "Pennisetum ciliare: a review of treatment efficacy, competitive traits, and restoration opportunities," is available at

About Invasive Plant Science and Management

Invasive Plant Science and Management is a journal of the Weed Science Society of America, a nonprofit scientific society focused on weeds and their impact on the environment. The publication focuses on invasive plant species. To learn more, visit

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Natalie Warrender 

Natalie Warrender | EurekAlert!
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