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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Markham, T. D.;
Rimelspach, J. E.;
Boehm, M. J. |
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| Author Affiliation: | Department of Plant Pathology, The Ohio State University, Columbus, Ohio |
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| Title: | Development and use of a bentgrass bioassay to screen rootzone mixes for potential biocontrol activity against Gaeumannomyces graminis var. avenae |
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| Meeting Info.: | APS Annual Meeting, August 9-13, 1997, Rochester, New York |
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| Source: | Phytopathology. Vol. 87, No. 6, June 1997, p. S63. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis; Root zone mixture; Bioassay; Biological control; Gaeumannomyces graminis var. avenae; Take-all patch; Mercury fungicides; Phenylmercury acetate; Pseudomonas; Fatty acids; Gas chromatography
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| Abstract/Contents: | "Gaeumannomyces graminis var. avenae, the causal agent of take-all patch, is a potentially devastating ectotrophic root pathogen often associated with severe damage to newly established or renovated bentgrass stands. Previously, take-all patch was treated with mercury-containing fungicides such as phenyl mercuric acetate (PMA), but these chemicals are no longer produced. A phenomenon similar to take-all decline in monocultured wheat occurs on diseased bentgrass after a period of several years, and symptoms recede. A collection of bacteria isolated from soil and plant samples were screened in vitro on potato dextrose agar (PDA) and King's medium B (KB) for their ability to supress G. graminis var. avenae. Approximately 21% and 29% of the strains were antagonistic to G. graminis var. avenae on PDA and KB, respectively. Pseudomonas and Stenotrophomonas species, identified with gas chromatographic fatty-acid analysis, were among the most efficacious strains tested. A bentgrass-G. graminis var. avenae bioassay was developed for further in situ screening of bacterial antagnoists, rootzone mixes, and virulence of pathogenic fungal isolates." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Markham, T. D., J. E. Rimelspach, and M. J. Boehm. 1997. Development and use of a bentgrass bioassay to screen rootzone mixes for potential biocontrol activity against Gaeumannomyces graminis var. avenae. Phytopathology. 87(6):p. S63. |
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