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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Wetzel, H. C. |
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| Author Affiliation: | Department of Agronomy, University of Maryland, College Park, MD 20742 |
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| Title: | Brown patch control with experimental fungicides, 1994 |
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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. 50, 1995, p. 369. |
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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: Lolium perenne; Brown patch; Rhizoctonia solani; Dollar spot; Sclerotinia homoeocarpa; Disease control; Fungicides; Azoxystrobin
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| Cultivar Names: | Caravelle |
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| Abstract/Contents: | "Fungicides were applied with a CO² pressurized (35 psi) sprayer equipped with a flat-fan (8010) nozzle, and calibrated to deliver 2.5 gal water per 1000ft₂. Dates of application and spray invervals are noted in the data table. Soil was a Chillum silt loam with a pH of 6.2 and 2.7% OM. Turf was mowed to a height of 0.75 in., fertilized with 3.0 lb N/1000ft₂/yr, and irrigated to prevent drought stress. Plots were 5 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 = no blight and 100 = entire plot area blighted. Brown patch and dollar spot ratings exceeding 5 and 0.5%, respectively would be considered unacceptable injury for a golf course fairway. Brown patch pressure was severe during most of the test period. ICIA 5504 provided exceptional brown patch control throughout the study regardless of rate or spray interval. ASC 67098-Z reduced blighting significantly, but generally provided unacceptable brown patch control. Fluazinam, regardless of rate/interval, provided marginally acceptable control until 22 Jul. The low rate of fluazinam provided unacceptable brown patch control after 12 Jul, and the high rate was associated with unacceptable blighting on the final rating (i.e., 2 Aug). Daconil 825 provided good brown patch control at both rates up until 22 Jul (i.e., 11 days after last applied). Daconil 825 applied at 3.8 oz provided better control than the 2.5 oz rate thereafter, but the level of control was unacceptable. Fungo provided marginal brown patch control through 22 Jul, but not after this date. Primo did not reduce or enhance R. solani blighting. Data collected 27 Jun showed that Primo-treated plots were more severely blighted by S. homoeocarpa than untreated plots; whereas, ICIA 5504 appeared to enhance dollar spot when data were collected on 2 Aug." Data from this study is presented in table form. |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #359
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and H. C. Wetzel. 1995. Brown patch control with experimental fungicides, 1994. Fungicide Nematicide Tests. 50:p. 369. |
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