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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T040.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Tredway, L. P.;
Butler, E. L.;
Franklin, R. B. |
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| Author Affiliation: | Department of Plant Pathology, North Carolina State University, Raleigh, North Carolina |
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| Title: | Preventative control of dollar spot in creeping bentgrass putting greens, 2005 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | F&N Tests. Vol. 61, 2006, p. T040. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Dollar spot; Preventive control; Fungicide trials; Application rates; Application timing; Disease severity; Golf greens
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| Cultivar Names: | SR1119 |
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| Abstract/Contents: | "Fungicides were evaluated for preventative control of dollar spot caused by Sclerotinia homoecarpa. This trial was conducted at the Lake Wheeler Turfgrass Field Laboratory in Raleigh, NC on 'SR1119' creeping bentgrass maintained under putting green conditions. Mowing was performed 5 times weekly at a height of 0.156-in. until 20 Jun, when the height was raised to 0.185-in.. Clippings were collected and the site was irrigated to prevent drought stress. To encourage dollar spot development, no fertilizer was applied throughout this study. Insect pests were suppressed with Dursban Pro (1.5 fl oz/1000 sq ft) on 23 Jun, 21 Jul, and 23 Aug. Plots were 3.33 ft x 6 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 2 gal per 1000 sq ft with a CO2 powered sprayer at 40 psi using TeeJet 8004 nozzles. All treatments were initiated on 28 Apr and were reapplied at the appropriate intervals as indicated in the table. The experimental area was inoculated on 18 Apr using rye grain infested with Sclerotinia homoecarpa isolates PST-4, PST-17, and LWC-27 to encourage dollar spot development. All dollar spot infection centers within each plot were counted on 4 May, 25 May, 1 Jun, 8 Jun, 15 Jun, 24 Jun, 1 Jul, 6 Jul, and 20 Jul. Turfgrass quality was evaluated on 25 Jul, using a 1 to 9 scale (9=best, 5=acceptable) based on color, density, and uniformity. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t test (k=100). Most treatments provided good to excellent control of dollar spot throughout this study. Treatments containing EcoGuard, 3336 50WP, and 3336 PLUS failed to provide acceptable control of the disease on several rating dates. A significant difference was detected among weekly and bi-weekly applications of Ecoguard on 8 Jun and 15 Jun, but neither treatment provided significant dollar spot control compared to the untreated plots. Turfgrass quality was assessed on 25 Jul, which was at the end of the trial and during summer stress for creeping bentgrass in North Carolina's Piedmont region. Most treatments resulted in inadequate turfgrass quality due to severe physiological decline and algae invasion. However, plots treated with the following fungicides provided significantly better quality compared to the untreated control: 26GT 2 SC (4 fl oz), Banner MAXX 1.3EC (0.5 fl oz), and Treatment #30 (program)." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tredway, L. P., E. L. Butler, and R. B. Franklin. 2006. Preventative control of dollar spot in creeping bentgrass putting greens, 2005. F&N Tests. 61:p. T040. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T040.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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