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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1992/Environmental/27773, U California, Casale.PDF
Last checked: 11/21/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Casale, William L.; Ohr, Howard |
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| Author Affiliation: | Casale: Principal Investigator; and Ohr: Investigator, Department of Plant Pathology, University of California, Riverside |
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| Monograph Title: | Investigation of Turf Disease Decline for Potential Development of Biological Control Methods: [1992 Annual Research Report], 1992. |
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| Publishing Information: | Riverside, California: Department of Plant Pathology, University of California |
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| # of Pages: | 8 |
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| Collation: | [1], 7 pp. |
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| Abstract/Contents: | "In response to environmental concerns and increasing restrictions on the use of chemical pesticides alternative disease control methods must be developed to reduce our reliance on these materials. Biocontrol of plant disease through the use of "beneficial" microorganisms that are antagonists of disease-causing microorganisms is one such alternative. Since March 1991 we have been investigating sites where disease has declined naturally as sources of potential biocontrol agents and ecological information that will be used to develop and implement biocontrol methods for turf diseases. We hypothesize that disease decline may be due to increased activity of indigenous microorganisms antagonistic to the pathogen. Of 147 microbial isolates (from a UCR bermudagrass plot showing decline of spring dead spot caused by Leptosphaeria korrae) tested so far, 41 bacteria and 19 fungi inhibited growth of Sclerotium rolfsii (cause of southern blight) by antibiosis; 6 fungi parasitized S. rolfsii. Growth of Rhizoctonia solani (cause of brown patch) was inhibited by 25 bacteria and 26 fungi. Tests with L. korrae are not yet completed. In greenhouse experiments, 2 bacterial isolates, JT78 and JT80, were most effective at reducing disease caused by S. rolfsii and R. solani in perennial rye. We observed no detrimental effect on plants by these biocontrol agents, even when applied at high concentrations. We have begun field testing potential biocontrol agents at two Bermuda grass plots naturally infected with L. korrae; results are pending. Identification of additional disease decline sites and collections from these sites is continuing." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article "Investigation of turf disease decline for potential development of biological control methods" 1992 Environmental Research Summary [USGA], 1992, p. 15, R=27773. R=27773 |
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| Note: | Also appears as pp. 00193-00201 in the USGA Turfgrass Research Committee Reporting Binders for 1992.
"Climatic Region: Warm Arid"
"USGA Region: Western"
Summary appears as abstract.
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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| Web URL(s):
http://archive.lib.msu.edu/tic/rpr/1992/Environmental/27773, U California, Casale.PDF
Last checked: 11/21/2013
Requires: PDF Reader |
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