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| Publication Type:
| Report |
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| Author(s): | Vincelli, Paul;
Doney, Jack C. Jr.;
Powell, A. J. |
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| Author Affiliation: | Vincelli and Doney, Department of Plant Pathology; Department of Agronomy, University of Kentucky, Lexington, KY 40546-0091 |
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| Title: | Effects of fungicides on overall turfgrass quality of creeping bentgrass, 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. 354. |
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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: Agrostis stolonifera; Dollar spot; Brown patch; Fungicide evaluation; Disease control; HAS decline; Anthracnose foliar blight; Quality evaluation; Agrotis ipsilon; Phytotoxicity
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "The test was conducted on a sward of creeping bentgrass (cv. Penncross) on a Maury silt loam at the University of Kentucky Spindletop Farm. The turf was mowed at 0.25 in., irrigated as needed, and fertilized as follows: 1 lb N/1000 ft₂ on 8 Oct and 17 Dec 93; 0.5 lb N/100 ft₂ on 16 May 94; and 1 lb N/1000 ft₂ on 21 Aug 94. Plots measured 4 ft x 4 ft with 2-ft border and were arranged in a randomized complete block design with three replications. Sprays were applied using a CO²-powered, hand-held sprayer fitted with Spray Systems 8003E flat fan nozzles which delivered 2.5 gal/1000ft₂. Control plots were treated with water. All treatments were applied during early AM hours on 27 May; subsequent applications were made following the schedules indicated in the table below. Actual spray dates were 27 May, 8 & 22 Jun, 6 & 20 Jul, and 4 Aug. Disease developed from natural inoculum and were assessed separately. Turfgrass quality was rated on a scale of 1 (poorest quality) to 9 (excellent turfgrass quality). Plots were treated for black cutworm control with Sevinmal F at 6 fl oz/1000 ft₂ on 21 Jul. Dollar spot and anthracnose were the primary determinants of turf quality in this experiment, as pressure from these two diseases was high by midsummer. Brown patch, plant growth regulating effects, phytotoxicity, and discoloration from off-color fungicide residue were secondary factors that also affected turf quality in individual treatments. Chitosan plots turned dark green for several weeks after each application, and exhibited an undesirable chlorosis on 27 Jun. Excessive nitrogen application was suspected to be the cause of the symptoms observed, as a lab analysis indicated a total N content of Chitosan to be 9.6%. Plots treated with Sentinel occasionally exhibited a slightly coarser texture. The following data are provided to indicate the range of disease damage in the test by 2 Aug: Dollar spot was present in the water control and the Banner/Daconil 2-wk treatment at 5.8 and 0.1 infection centers/ft₂, respectively: and the anthracnose/ brown patch complex was present at 75% and 1% of plot surface, respectively. No other phytotoxicity or physiological response was noted in the test. Other reports are available which provide details on disease development." |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #344
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., J. C. Jr. Doney, and A. J. Powell. 1995. Effects of fungicides on overall turfgrass quality of creeping bentgrass, 1994. Fungicide Nematicide Tests. 50:p. 354. |
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