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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1998/61822,%20Kansas%20State, Tisserat.PDF
Last checked: 04/17/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Tisserat, Ned; Fry, Jack; Keeley, Steve; Huang, Bingru; Wetzel, Henry III; Iriarte, Fanny; Hulbert, S. H. |
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| Author Affiliation: | Tisserat: Deaprtment of Plant Pathology; Fry, Keeley, and Huang: Division of Horticulture, Kansas State University, Prinipal Investgator; Wetzel: Ph. D. candidate; and Iriarte: Ph. D. candidate |
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| Monograph Title: | The Biology and Management of Spring Dead Spot in Bermudagrass: 1998 Progress Report, 1998. |
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| Publishing Information: | Manhattan, Kansas: Kansas State University |
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| # of Pages: | 22 |
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| Collation: | 3, 19 pp. |
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| Abstract/Contents: | "Spring dead spot (SDS) is a serious disease of bermudagrass along the northern range of its adaptation in the USA. Three distinct root-rotting fungi called Ophiosphaerella herporicha, O. korrae, and O narmari (formerly Leptosphaeria korrae and L. normari) cause this disease. The purpose of our research is to learn more about the distribution and biology of these SDS pathogens, and based on this understanding, to develop more effective strategies for managing this disease. Diseased bermudagrass stolons and roots were sampled from golf courses in Kansas, Oklahoma, and Kentucky. O. herpotricha and O. korrae were recovered from samples in all states, with O. herpotricha being slightly more abundant. O. normari, previously reported only in Australia, was detected for the first time in North America frm samples collected in Oklahoma and Kansas. Little is known about the population structure of SDS pathogens on a local and regional scale. Similarities among isolate of O. herpotricha are being analyzed by amplified fragment length polymorphism (AFLP) analysis. Preliminary analysis suggests that on individual fairways, there is a mosaic of clones of O. Herpotricha. However, on a regional scale there appears to significant genetic heterogeneity among isolates. Less diversity has been detected among isolates of O. korrae and O. narmari. Field and greenhouse studies are being conducted to evaluate the resistance of seed- and vegetatively propagated bermudagrass selections to spring dead spot. Field trials in Oklaomna indicated that several bermudagrass entries including Guymon, Sundevil, Midlawn, Midfield, Ft. Reno, and Mirage were more resistant to spring dead spot. We are currently developing greenhouse and laboratory methods to more rapidly screen bermudagrass selections for disease resistance. Furthermore, we are determining whether there are differences in pathogenicity to bermudagrass selections among the three SDS pathogens. Various cultural and chemical control strategies have been proposed to control spring dead spot. We established a trial 1998 to evaluate the effects of some of these control recommendations, alone and in combination, for suppression of SDS. Treatments include summer aerification and verticutting, soil acification with ammonium sulfate, and fungicide treatments." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article, "The biology and management of spring dead spot in bermudagrass", 1998 Turfgrass and Environmental Research Summary [USGA], 1998, p. 20, R=61822. R=61822 |
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| Note: | Also appears as pp. 47-69 in the USGA Turfgrass Research Committee Reporting Binders for 1998.
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Last checked: 04/17/2013
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