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| DOI: | 10.1094/PHYTO.2009.99.6.S196 |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2009.99.6.S196#page=4
Last checked: 06/12/2009
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Miller, G. L.;
Tredway, L. P. |
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| Author Affiliation: | North Carolina State University, Raleigh, North Carolina |
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| Title: | Optimal timing of preventative fungicide applications for fairy ring caused by Vascellum pratense in creeping bentgrass putting greens |
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| Section: | 2009 southern division meeting abstracts
Other records with the "2009 southern division meeting abstracts" Section
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| Meeting Info.: | Atlanta, Georgia: 1-2, 2009 |
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| Source: | Phytopathology. Vol. 99, No. 6, June Supplement 2009, p. S199. |
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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: Preventive control; Fungicide application; Fairy rings; Agrostis stolonifera; Golf greens; Mycelium; Application timing; Lycoperdon pratense; Soil temperature; Manual irrigation; Disease severity
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| Abstract/Contents: | "Fairy ring symptoms occur around the outer edge of a subsurface fungal colony, where density of mycelium is greatest. This mycelial mat can result in soil hydrophobicity, resulting in turf loss and making delivery of curative fungicide applications difficult. In 2007 and 2008, single spring applications of the low and high rates of triadimefon and tebuconazole were evaluated for control of fairy ring on 'A-1' creeping bentgrass maintained under putting green conditions. Each treatment was applied when 5-day average soil temperatures (2 inch depth) reached 10°C, 13°C, 16°C, 18°C, 21°C, or 24°C. Treatments were arranged in a split plot design with timing as main plots and fungicides as subplots. Fungicides were applied in 0.08 L H2O m-2 and immediately watered in by hand with 6 mm of irrigation. Surfactants were not tank-mixed with fungicides, but Cascade Plus (Precision Laboratories, Waukegan, IL) was applied on monthly intervals to prevent localized dry spot. Visual and objective disease severity ratings were taken every 7-14 days. Data were subjected to analysis of variance and mean were separated with the Waller Duncan k-ratio t-test (k = 100). Fairy ring symptoms were most severe in 2007 due to drought conditions. In 2007, symptoms were began to appear prior to the 24°C application timing, rendering these treatments curative in nature. In both years, all preventive fungicide treatments resulted in adequate control of fairy ring in early summer, but suppression failed later in the season. In 2007, plots treated with the low rate of triadimefon had higher disease severity in late summer than those treated with the high rate of triadimefon or either rate of tebuconazole. Area under the disease progress curve (AUDPC) was lowest for fungicides applied at 13°C, 16°C, and 18°C in 2007. In 2008, AUDPC values were highest for the earliest (10°C) and latest (24°C) application timings." |
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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):
Miller, G. L., and L. P. Tredway. 2009. Optimal timing of preventative fungicide applications for fairy ring caused by Vascellum pratense in creeping bentgrass putting greens. Phytopathology. 99(6):p. S199. |
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| DOI: 10.1094/PHYTO.2009.99.6.S196 |
| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2009.99.6.S196#page=4
Last checked: 06/12/2009
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2219736a |
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Digitally in TIC by file name: phytp2009junsoutherndiv |
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