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Keyword: biocontrol

Rush skeletonweed (Chondrilla juncea L.) in the northern Great Basin - Research Summary

Documents and Media Posted on: May 25, 2016
Rush skeletonweed, an exotic herbaceous member of the sunflower family, has spread rapidly from its first known occurrence near Spokane, Washington and now occurs on 2.5 million acres in the Western U.S. Recent research has focused on development of more effective biocontrols, its response to fire in the sagebrush ecosystem and its potential for spread in the Great Basin. Document Type: White Papers

Community ecology of fungal pathogens on Bromus tectorum [Chapter 7]

Publications Posted on: March 22, 2016
Bromus tectorum L. (cheatgrass or downy brome) presents a rich resource for soil microorganisms because of its abundant production of biomass, seeds, and surface litter. Many of these organisms are opportunistic saprophytes, but several fungal species regularly found in B. tectorum stands function as facultative or obligate pathogens.

Invasive Plants — Issues, Challenges, and Discoveries Webinar Series

Events Posted on: March 15, 2016
The USDA Forest Service Rocky Mountain Research Station hosted a webinar series, Invasive Plants — Issues, Challenges, and Discoveries Webinar Series, to provide attendees with cutting-edge information about invasive plants and their management. This webinar series was sponsored by the Station’s Grassland, Shrubland and Desert Ecosystems Science Program.

A new look at the race for survival: Cheatgrass biocontrol with “black fingers of death”

Science Spotlights Posted on: September 09, 2015
Cheatgrass is one of the most destructive plant invaders in the West with significant economic and ecological impacts on rangelands and agricultural lands. The seed pathogen "black fingers of death" is a promising tool under consideration for biocontrol of cheatgrass. Understanding the effects of slow-growing versus fast-growing pathogen strains may be the key to successfully slow down or stop cheatgrass seed germination.

Plant invasions: How do mild-mannered plants transform into superinvaders?

Projects Posted on: May 19, 2015
For over 10 years, Rocky Mountain Research Station scientists and their partners have engaged in research to 1) determine the causes underlying plant invasions, 2) identify invader impacts in native systems, and 3) improve the efficacy of invasive plant mitigation efforts.

Spruce aphid (Elatobium abietinum Walker) (Hemiptera: Aphididae) [Chapter XXIV]

Publications Posted on: April 21, 2015
Elatobium abietinum Walker is a spruce-feeding aphid that in Europe is referred to as the green spruce aphid (Day et al., 1998a) (Fig. 1). However, in North America E. abietinum is known simply as the spruce aphid, while the common name "green spruce aphid" refers to a different species, Cinara fornacula Hottes (Hemiptera: Aphididae) (

Science You Can Use Bulletin: Toadflax stem miners and gallers: The original weed whackers

Publications Posted on: March 04, 2015
Dalmatian and yellow toadflax are aesthetically pleasing weeds wreaking havoc in rangelands across the western United States. These non-native forbs spread rapidly into fields following fire, tilling, construction, or other disturbances. They are successful and stubborn invaders, producing massive quantities of seeds each year and rapidly re-sprouting from root fragments.

GSD Update: Year in Review: Spotlight on 2013 research by the Grassland, Shrubland and Desert Ecosystems Science Program

Publications Posted on: October 01, 2014
In this issue of the GSD Update, we take a look back at selected studies of the Grassland, Shrubland and Desert Ecosystems Science Program (GSD) that depict its strengths and focus areas. Significant results of recent research and science delivery by GSD scientists are highlighted. We feature program research that lines up with the strategic research priorities of the USDA Forest Service and the Rocky Mountain Research Station (RMRS).

A race for survival: Can Bromus tectorum seeds escape Pyrenophora semeniperda-caused mortality by germinating quickly?

Publications Posted on: October 03, 2011
Pathogen-seed interactions may involve a race for seed resources, so that seeds that germinate more quickly, mobilizing reserves, will be more likely to escape seed death than slow-germinating seeds. This race-for-survival hypothesis was tested for the North American seed pathogen Pyrenophora semeniperda on seeds of the annual grass Bromus tectorum, an invasive plant in North America.

GSD Update: What are invasive species? ... And do we really need to worry about them?

Publications Posted on: October 03, 2011
Invasive species are the focus of the September 2011 issue of GSDUpdate: What Are Invasive Species? And Do We Really Need to Worry About Them? An invasive species is any species - non-native or native to a region - that could cause economic or ecological harm to an area. Invasives can be weeds, shrubs and trees, insects, mollusks, vertebrates and even microorganisms and pathogens such as exotic bacteria, fungi and viruses.