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| Web URL(s): | http://usgatero.msu.edu/v02/n02.pdf
Last checked: 2/2003
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Kaminski, John E.;
Dernoeden, Peter H. |
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| Author Affiliation: | Kaminski: Graduate Research Assistant; and Dernoeden: Professor of Plant Pathology, Department of National Resource Sciences and Landscape Architecture, University of Maryland |
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| Title: | Understanding bentgrass dead spot |
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| Source: | USGA Turfgrass and Environmental Research Online. Vol. 2, No. 2, January 15 2003, p. [1-9]. |
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| Publishing Information: | Far Hills, NJ: United States Golf Association, Green Section |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Fall spot of bentgrass; Agrostis stolonifera; Cynodon dactylon; Cynodon transvaalensis; Ophiosphaerella agrostis; Cultivar evaluation; Disease susceptibility; Fungicide application; Golf greens; Turf recovery; Golf courses
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| Abstract/Contents: | "Bentgrass dead spot (BDS) is a recently discovered disease of creeping bentgrass (Agrostis stolonifera) and bermudagrass (Cynodon dactylon X C. transvalensis) putting greens that is incited by the fungal pathogen Ophiosphaerella agrostis. Survey reports and cultivar evaluation trials revealed that creeping, colonial and velvet bentgrasses are susceptible to BDS. Of the 28 different golf courses from which O. agrostis is isolated, however, 14 had grown L-93 in monostands or in blends. It is worth noting that only a single isolate was used in this study, and that varying races of the pathogen may exist in nature. Variation among O. agrostis isolates could result in varying levels of disease severity among bentgrass cultivars. The fungus rapidly produces fruiting bodies in the absence of fungicide use, and the pathogen is rapidly dispersed by ascopores. Under suitable conditions, ascospores can germinate in as little as two hours. The disease was most commonly found on greens within two years following the seeding of new greens or older greens that had been fumigated with methyl bromide. Field observations confirm that the disease normally declines dramatically within one to three years. The oldest greens where BDS was found were six years old. However, disease may reappear during periods of prolonged heat stress. Thus far, BDS appears to be restricted to sand-based greens, collars, and tees, and has not been found in bentgrass or bermudagrass grown on native soil. Results of the survey and other observations confirmed that the disease is most prevalent in July and August, but may appear in May and can remain active in bentgrass as late as December. In a bermudagrass green in Florida, however, the disease appeared as early as March." |
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| Language: | English |
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| References: | 9 |
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| See Also: | Other Reports from this USGA research project: 2001-07-205 |
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| Note: | Pictures, color
Tables
Includes map, "Location of creeping bentgrass and bermudagrass greens confirmed to be infected by Ophiosphaerella agrostis in the United States between 1998 and 2002" p.4
Summary as abstract |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E., and P. H. Dernoeden. 2003. Understanding bentgrass dead spot. USGA Turfgrass Environ. Res. Online. 2(2):p. [1-9]. |
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| Web URL(s):
http://usgatero.msu.edu/v02/n02.pdf
Last checked: 2/2003
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 A65 [online] |
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