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Potential for Biological Control of Downy Brome (Bromus tectorum) and Medusahead (Taeniatherum caput-medusae) with Crown and Root Rot Fungi

Published online by Cambridge University Press:  12 June 2017

William E. Grey ,
Paul C. Quimby Jr. ,
Donald E. Mathre  and
James A. Young
William E. Grey
Affiliation:
Dep. Plant Pathology, Montana State Univ., Bozeman, MT
Paul C. Quimby Jr.
Affiliation:
USDA-ARS, Range, Weeds and Cereals Research Unit, Bozeman, MT
Donald E. Mathre
Affiliation:
Dep. Plant Pathology, Montana State Univ., Bozeman, MT
James A. Young
Affiliation:
Range Scientist, USDA-ARS, Reno, NV
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Abstract

The effects of five soil fungi, endemic to the western United States, were evaluated for disease reaction, root dry weights and shoot dry weights on five grass species. The undesired grass, downy brome or medusahead, the perennial forage species, squirreltail or western wheatgrass, and winter wheat were susceptible to take-all. Downy brome, medusahead, squirreltail, and winter wheat were susceptible to crown rot. The desired grasses, squirreltail, western wheatgrass, and winter wheat, were susceptible to barepatch. Crown rot is adapted to dry soils and may be a potential biological control on downy brome and medusahead in the arid environment of the western U.S.

Keywords

Barepatch, Rhizoctonia solani Kühn (Anastomosis Group 8)crown rot, Fusarium culmorum (W.G. Smith) Sacc.take-all, Gaeumannomyces graminis (Sacc.) Arx & D. Oliver van ‘tritici’ J. Walkerdowny brome, Bromus tectorum L. # BROTEmedusahead, Taeniatherum caput-medusae ssp. asperum [Simk.] Melderis # ELYCMsquirreltail, Elymus elmoides (Rafino) Swezey # SITHYwestern wheatgrass, Agropyron smithii Rydb.winter wheat, Triticum aestivum L.Plant pathogensrangeland
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 362 - 365
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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