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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/fntests/vol55
Last checked: 06/2005
Access conditions: Item is within a limited access website |
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| Publication Type:
| Report |
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| Author(s): | Vincelli, P.;
Dixon, E.;
Williams, D. |
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| Author Affiliation: | Vincelli and Dixon: Department of Plant Pathology; and, Williams: Department of Agronomy, University of Kentucky, Lexington, Kentucky |
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| Title: | Efficacy of Fungicides for control of brown patch, anthracnose, and red leaf spot on creeping bentgrass, 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. 504-505. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Application rates; Disease severity; Agrostis stolonifera; Brown patch; Rhizoctonia solani; Anthracnose; Colletotrichum graminicola; Red leaf spot; Pyrenophora erythrospila; Fungicides; Fungicide evaluation; Fungicide combinations; Disease control; Golf greens; Localized dry spots; Fairy rings; Color
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "The test was conducted on a Maury silt loam located at the University of Kentucky Turf Center near Lexington. The turf was maintained at 0.19 in. mowing height, irrigated as needed, and fertilized with 1 lb N as 22-0-16 Scott's Fertilizer on 3 Nov 98. Plots measured 4 ft X 4 ft with 2 ft borders, and were arranged in a randomized complete block design with three replications. Fungicides sprays were applied using a CO₂-pressurized hand held sprayer fitted with Spray Systems 8003E flat-fan nozzles delivering 2.5 gal/1000 sq ft. All treatments were first applied on 26 May; remaining sprays were applied according to the schedules indicated in the table. Plots were assessed visually on 30 Jul and 3 Aug for damage due to anthracnose, red leaf spot, and brown patch. On 16 Aug, visual assessments included foliar damage from localized dry spot. In this trial, there was enough overlap among symptoms to preclude reliable assessment of each disease separately in each plot. All data were analyzed using ANOVA and Least Significance Difference (LSD) Test, (P=0.05). Weather during the trial period was generally favorable for brown patch (BP) through much of July, and that disease was the principal cause of foliar necrosis in the rating on 30 Jul and 3 Aug. Based on careful visual examination and inspections using a 25X field microscope of the untreated plots and untreatd border areas, we estimate that BP accounted for about 50% of the foliar necrosis and that red leaf spot (RLS) and foliar anthracnose (An) accounted for about 30% and 20% of each, respectively on those dates. Significant levels of basal anthracnose were not evident on 30 Jul. Weather from mid-Jul on was generally hot and dry, and was progressively less favorable for continued BP development. Because of ongoing drought and conditions of high evapotranspirational demand, symptoms of localized dry spot (LDS) became evident by 16 Aug. Because of the presence of faint rings of darker green turf and growth stimulation around many LDS patches (suggestive of fairy ring), it is suspected that the LDS observed was biotic in nature. Our estimates of contribution to overall foliar necrosis on 16 Aug are 30%, 25%, 25%, and 20% for BP, An, LDS, and RLS, respectively. Plots treated with the combination of Compass 50WG and Banner MAXX 1.24MEC exhibited a subtle darker green color and widening of leaf blades; this was detectable in two of three replications on 3 Aug. No other phytotoxicity nor growth regulator effect was noted. All fungicides in the test with the exception of Companion showed some abilty to reduce incidence of this disease complex." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: Fairy Rings |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., E. Dixon, and D. Williams. 2000. Efficacy of Fungicides for control of brown patch, anthracnose, and red leaf spot on creeping bentgrass, 1999. Fungicide Nematicide Tests. 55:p. 504-505. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/fntests/vol55
Last checked: 06/2005
Access conditions: Item is within a limited access website |
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MSU catalog number: SB 951.3 .F82 |
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