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| Web URL(s): | http://www.apsnet.org/publications/plantdisease/backissues/Documents/1987Articles/PlantDisease71n09_774.pdf
Last checked: 08/24/2010
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Smiley, Richard W. |
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| Author Affiliation: | Columbia Basin Agricultural Research Center, Oregon State University, Pendleton, Oregon |
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| Title: | The etiologic dilemma concerning patch diseases of bluegrass turfs |
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| Source: | Plant Disease. Vol. 71, No. 9, September 1987, p. 774-782. |
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| Publishing Information: | St. Paul, Minn., American Phytopathological Society |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Fusarium poae; Fusarium culmorum; Fusarium blight; Necrotic ring spot; Gaeumannomyces; Take-all patch; Etiology; Patch diseases; Poa pratensis; Phialophora; Summer patch; Disease control
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| Abstract/Contents: | Several necrotic patches on Kentucky bluegrass began to occur in the 1950's. The disease gained national prominence in 1964 when it devastated the south lawn at the White House. Intense pressure was exerted on pathologists to identify and control the disease. Early studies led to development of moderately effective controls but practices made it increasingly doubtful that Fusarium spp. were primary agents for many patches diagnosed as Fusarium blight. The issue became more complex when an association of Rhizoctonia spp. was suppected for patches similar to those of Fusarium blight. In the mid-1960's, Couch and Bedford concluded that the incitants were Fusarium roseum f. sp. culmorum and F. tricinctum f. sp. poae which occurred in high frequency on leaves, crowns and roots of affected plants. They coined the name "Fusarium blight". In the late 1970's several scientists openly disagreed on the etiology of Fusarium blight. However, progress toward unveiling a better understanding of the patch disease syndrome was made simultaneously in early 1980. Introductions to important findings and concepts were available. Direct isolation of the fungi from patch affected turfs became more reliable. Koch's postulates were fulfilled for fungi identified as Leptospheria Korrae and Phialophora graminicola. Patches caused by L. Korrae in bluegrass or other cool-season turfgrass have been named "Necrotic ring spot". Summer patch is caused by Phialophora spp. Although toxonomic characteristics led to the identificaiton of P. graminicola , further changes in pathogen identiy are imminent. The etiology dilemma concerning Fusarium blight continues. The ability of Gaeumannomyces graminis to infect roots to cause Take-all patch of bentgrasses should be a warming that it, too, should not be disregarded as a potential agent of patches on bluegrass. |
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| Language: | English |
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| References: | 31 |
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| See Also: | See also partial reprint in ALA, January 1988, v. 9:1, p.42-45, R=12005 R=12005 |
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| See Also: | Other items relating to: SUMPAT |
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| Note: | Pictures, color & b/w |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smiley, R. W. 1987. The etiologic dilemma concerning patch diseases of bluegrass turfs. Plant Dis. 71(9):p. 774-782. |
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| Web URL(s):
http://www.apsnet.org/publications/plantdisease/backissues/Documents/1987Articles/PlantDisease71n09_774.pdf
Last checked: 08/24/2010
Requires: PDF Reader |
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MSU catalog number: SB 599 .P95 |
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