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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-105-4-S2.1#page=6
Last checked: 05/12/2015
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| Publication Type:
| Report |
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| Author(s): | Koehler, A.;
Shew, H. D. |
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| Author Affiliation: | NCSU Plant Pathology, Raleigh, NC |
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| Title: | Seasonal dynamics and the impacts of fungicide use on the diversity of pathogens causing brown patch of tall fescue |
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| Section: | Southern Division Meeting abstracts
Other records with the "Southern Division Meeting abstracts" Section
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| Meeting Info.: | Atlanta, Georgia: February 1-2, 2015 |
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| Source: | Phytopathology. Vol. 105, No. 4S, April 2015, p. S2.6. |
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| Publishing Information: | Lancaster, Pennsylvania: The Society Intelligencer Printing Company for The American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Azoxystrobin; Ceratobasidium; Disease control; Festuca arundinacea; Flutolanil; Fluxapyroxad; Fungicide evaluation; Pathology; Propiconazole; Rhizoctonia blight; Rhizoctonia solani; Rhizoctonia zeae; Seasonal variation
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| Abstract/Contents: | "Brown patch, caused by the Rhizoctonia solani complex, is the most severe disease of tall fescue in home lawns across the southeast US. Multiple studies have reported a diverse group of species and anastomosis groups associated with symptoms of the disease. Understanding the genetically distinct populations of pathogens present is an important consideration for the management of this disease. Early (May) and late (July-August) season isolates were collected to better understand seasonal pathogen distribution, and to identify if pathogen diversity has changed following continued use of strobilurin fungicides by comparing isolates to those of a previous survey. Rhizoctonia species were isolated from individual brown patch lesions on tall fescue leaf blades in the summers of 2013 and 2014 in managed (fungicides applied) and unmanaged yards. Isolates were identified to species and anastomosis group by sequencing the ITS region. Ceratobasidium sp., R. Solani from anastomosis groups 2-2IIB and 1-1B, and R. zeae, were found. Ceratobasidium sp. were the most prominent in early season sampling with R. Solani and R. Zeae dominating late season sampling. One hundred twenty four isolates, including 6 historic isolates from untreated yards, were assayed for sensitivity to the fungicides azoxystrobin, flutolanil, fluxapyroxad, and propiconazole. Mean EC50 values varied across fungicides and species, but no resistance was observed." |
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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):
Koehler, A., and H. D. Shew. 2015. Seasonal dynamics and the impacts of fungicide use on the diversity of pathogens causing brown patch of tall fescue. Phytopathology. 105(4S):p. S2.6. |
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| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-105-4-S2.1#page=6
Last checked: 05/12/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website
Notes: Item is within a single large file |
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MSU catalog number: b2219736a |
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