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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-492.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Krouse, J. M.;
Davis, J. G. |
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| Author Affiliation: | Department of Natural Resource Sciences & LA, University of Maryland, College Park, MD |
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| Title: | Curative dollar spot control with Serenade, Spectro and Floradox, 1999 |
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| Section: | Turf grass reports
Other records with the "Turf grass reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 55, 2000, p. 492. |
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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: Disease severity; Quality; Application rates; Agrostis stolonifera; Dollar spot; Sclerotinia homoeocarpa; Chlorothalonil + thiophanate-methyl; Fungicide evaluation; Fungicides; Fungicide combinations; Scalping; Golf fairways
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| Cultivar Names: | Southshore |
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| Abstract/Contents: | "Treatments were applied with a CO₂ pressurized (34 psi) sprayer calibrated to deliver 2.5 gal water per 1000 sq ft. Dates of product application are footnoted in the data table. Turf was maintained at 0.6 in. mowing height. Soil was a Sassafras sandy loam with pH of 6.2 and 1.1% OM. The site was fertilized with 3.0 lb N per 1000 sq ft annually. Plots were 5 ft by 5 ft, and were arranged in a randomized complete block with four replications. Percent of plot area blighted was assessed visually on a linear 0 to 100% scale where 0=no blight and 100=entire plot area blighted. Blight ratings exceeding 1.0% would be considered commercially unacceptable for golf course fairway turf. Turf quality was assessed visually on a 0 to 10 scale where 0=entire plot area brown or dead; 8.0=minimum acceptable quality for a golf course fairway; and 10=optimum greenness, density and freedom of disease. Scalping, or excessive removal of leaf tissue resulting in a brown appearance of turf, was noted in plots with the most blighting from S. homoeocarpa. Evidently, the pathogen had weakened plants, predisposing them to mechanical damage. Scalping was visually assessed on a 0 to 5 scale with 0=no injury; 2.5 representing unacceptable injury; and 5.0=over 30% of the plot area brown from scalping. Dollar spot was active when treatments were first applied. Disease pressure was low to moderately severe in Jul, but dollar spot began to subside on 3 Aug. CL 3336 + Protect, and both rates of Spectro provided nearly complete dollar spot conrol on all rating dates. Furthermore, plots sprayed with the aforementioned treatments had excellent turf quality and were associated with little or no scalping on 3 Aug (i.e., 22 days since last application). Floradox had no effect on dollar spot, but both rates of Serenade reduced dollar spot significantly on 3 Aug. Plots treated with the high rate of Serenade had better quality and generally exhibited less scalping than plots treated with the high rate of Serenade had better quality and generally exhibited less scalping than plots treated with a low rate of Serenade, Floradox and the non-fungicide-treated control on 3 Aug." |
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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):
Dernoeden, P. H., J. M. Krouse, and J. G. Davis. 2000. Curative dollar spot control with Serenade, Spectro and Floradox, 1999. Fungicide Nematicide Tests. 55:p. 492. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-492.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
| 
MSU catalog number: SB 951.3 .F82 |
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