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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Thompson, D. C.;
Kobayashi, D. Y.;
Clarke, B. B. |
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| Author Affiliation: | Department of Plant Pathology, Rutgers University, New Brunswick, New Jersey |
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| Title: | A method of evaluating bacteria for suppression of summer patch and root colonizing ability on turfgrass |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 15-16, 1993 |
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| Source: | Proceedings of the Second Annual Rutgers TurfgrassSymposium. Vol. 2, 1993, p. 25. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Summer patch; Poa; Fine fescues; Ectotrophic root-infecting fungi; Magnaporthe poae; Growth chambers; Bacteria; Gaeumannomyces graminis var. avenae; Roots; Encroachment; Poa pratensis; Disease control
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| Cultivar Names: | Baron |
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| Abstract/Contents: | "Summer patch of bluegrasses and fine fescues is caused by an ectotrophic root-colonizing fungus, Magnaporthe poae. A controlled environment system using growth chambers was developed to evaluate bacteria for the ability to suppress summer patch and colonize the rhizosphere of turfgrass roots. Candidate bacteria were isolated from healthy bluegrass roots in areas with a history of summer patch or take-all disease, caused by Gaeumannomyces graminis f.sp. avenae. A total of 600 strains were evaluated for suppression of summer patch in growth chamber studies. More than 400 strains were evaluated for root colonizing ability (RCA) on 'Baron' Kentucky bluegrass in the controlled environment and for in vitro antifungal activity against M. poae on potato dextrose agar. Approximately 10% of the strains were found to suppress summer patch symptoms, and 75% were found to be good root colonizers with more than 105 cfu/g fresh root and rhizosphere soil. Suppression of M. poae growth in vitro was a characteristic of 40% of the strains, but this suppression was not correlated with symptom suppression in vivo. Strains that suppressed summer patch symptoms or had high RCA in the growth chamber studies were chosen for further evaluation in the field during 1992. A high correlation was found between RCA in the growth chamber and short- or long-term RCA in the field. Some strains were able to establish high populations rapidly, but others required repeated applications to attain similar population densities in the turf. Further research is underway to identify additional strains with desirable characteristics and to determine the ability of these superior bacteria to reduce summer patch in the field." |
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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):
Thompson, D. C., D. Y. Kobayashi, and B. B. Clarke. 1993. A method of evaluating bacteria for suppression of summer patch and root colonizing ability on turfgrass. Proc. Annu. Rutgers Turfgrass Symp. 2:p. 25. |
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MSU catalog number: SB 433 .R88 |
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