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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-484.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.;
Kaminski, J. E. |
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| Author Affiliation: | Department of Natural Resouce Sciences and LA, University of Maryland, College Park, Maryland |
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| Title: | Brown patch control with compass, 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. 484. |
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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; Agrostis tenuis; Brown patch; Rhizoctonia solani; Trifloxystrobin; Fungicide evaluation; Disease control; Residual effects; Propiconazole; Application rates; Application timing; Threshold values; Golf greens; Golf fairways
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| Cultivar Names: | SR 7100 |
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| Abstract/Contents: | "Fungicides were applied with a CO₂ pressurized (34 psi) sprayer equipped with a flat-fan (8010) nozzle, and calibrated to deliver 2.5 gal water per 1000 sq ft. Treatments were applied at various intervals on the dates footnoted in the data table. Soil was a Sassafras sandy loam with a pH of 6.0 and 1.1% OM. Turf was maintained at 0.60 in., and was fertilized with 3.0 lbs N/1000 sq ft/yr in the fall. Plots were 5 ft x 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=entire plot area green and healthy, and 100=entire plot area blighted. Ratings exceeding 2 and 4% blight would be considered unacceptable for golf course putting greens and fairways, respectively. Disease pressure was severe throughout most of the trial. Extended periods of dry weather, however, resulted in a reduction in disease severity by early Aug. All treatments provided nearly complete brown patch control during the active spray periods of 11 Jun to 9 Jul (all data not shown). Compass treaetments (0.20 and 0.25 oz) applied only once had lost residual effectiveness by 14 Jul (i.e. 33 days after applicataion). On 28 Jul, the residual effectiveness of all 21-day interval (i.e., 27 days since last applied) treatments had begun to dissipate. Among the 21-day treatments, however, only the 0.15oz rate of Compass exhibited unacceptable blighting on 28 Jul. There appeared to be a one week boost in the residual effectiveness of Compass by tank mixing the low rate of Compass (0.15 oz) with Banner MAXX. There was little benefit of mixing Banner MAXX with the higher rate of Compass (i.e., 0.20 oz). By 4 Aug, only plots treated three times on a 14-day interval with Compass (0.10, 0.15, and 0.20 oz) continued to reduce blighting to within the acceptable threshold for putting greens (i.e.,≤ 2% blighting). On the final rating date (i.e., 11 Aug), Compass applied three times at 0.20 oz on the 14-day interval (i.e., 41 days since last applied) continued to provide excellent brown patch control. However, the 0.15 oz rate of compass applied on the aforementinoned spray interval provided a level of control within the acceptable blight threshold for fairways at the end of the study." |
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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. E. Kaminski. 2000. Brown patch control with compass, 1999. Fungicide Nematicide Tests. 55:p. 484. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-484.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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