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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2010.100.6.S1#page=57
Last checked: 11/22/2010
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Jo, Y. |
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| Author Affiliation: | Texas A&M University, College Station, TX |
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| Title: | First characterization of a new Exserohilum foliar disease on warm season turfgrasses |
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| Section: | 2010 APS Annual Meeting abstracts of presentations
Other records with the "2010 APS Annual Meeting abstracts of presentations" Section
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| Source: | Phytopathology. Vol. 100, No. 65, June supplement 2010, p. S57. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon; Disease identification; Disease profile; Exserohilum; Foliar diseases; Zoysia
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| Abstract/Contents: | "An Exserohilum sp. has been isolated from foliar diseases observed on bermudagrass (Cynodon sp.) and zoysiagrass (Zoysia sp.) fairways and putting greens at golf courses in Houston, Texas since 2007. Disease symptoms on individual leaves exhibited prominent elliptical black lesions along the margin. Symptoms on the closely mowed turfgrass appeared as dark brownish to black spots of about 5 cm in diameter. As the disease progressed, individual spots coalesced into larger, irregular patches. Kochs postulates were verified for pathogenicity of the fungus on warm season turfgrasses through experiments in the growth chamber, and confirmation of the etiological agent causing the foliar disease was achieved. Mycelium was dark gray to black on potato dextrose agar medium, and produced no sexual fruiting structure or conidia unlike other Exserohilum spp. The fungus grew best on corn meal agar medium, and showed an optimal growth at 25?C and pH 7. Phylogeny trees were constructed based on internal transcribed spacer (ITS), Brn1 (reductase gene involved in melanin biosynthesis) and glyceraldehyde-3- phosphate dehydrogenase (gpd) gene sequences using PHYLIP. The sequences of the fungus isolated in the study showed no complete matching but high similarity with other known Exserohilum spp., indicating the fungus associated with a novel foliar disease on warm season turfgrasses is a new species of Exserohilum." |
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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):
Jo, Y. 2010. First characterization of a new Exserohilum foliar disease on warm season turfgrasses. Phytopathology. 100(65):p. S57. |
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| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2010.100.6.S1#page=57
Last checked: 11/22/2010
Requires: PDF Reader |
| 
MSU catalog number: b2219736a |
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Digitally in TIC by file name: phytp2010junpres |
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