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| Publication Type:
| Report |
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| Author(s): | Vincelli, P. C.;
Doney, J. D. Jr.;
Powell, A. J.;
Tisserat, N. |
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| Author Affiliation: | University of Kentucky, Lexington, KY; Kansas State University, Manhattan, KS |
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| Title: | Control of spring dead spot on bermudagrass, 1991-92 |
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| Source: | Fungicide and Nematicide Tests. Vol. 48, 1993, p. 359. |
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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: Cynodon dactylon; Spring dead spot; Fungicide application; Irrigation; Disease evaluation
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| Abstract/Contents: | "Plots were established in a bermudagrass (cv. 'Vamont') polo field at the Kentucky Horse Park in Lexington. The field has a history of severe outbreaks of spring dead spot. The experimental area had never received fungicide applications. The soil, a Maury silt loam, had a pH of 6.5. Plots measuring 12 x 22 ft wee [were] arranged in a RCBD with five replicates. Treatments were applied using hand-held, CO2-powered sprayer fitted with LF-2-80 flat-fan nozzles and delivering 2.0 gal/1000 ft2. All plots including controls received approximately 0.25 inch (38 gal/plot) irrigation immediately after treatment. Application dates were 1 Oct 91 and/or 5 Nov 91, as indicated in the table below. Soil temperatures (3 inch depth) at treatment application were 21 C on 1 Oct, 16 C on 1 Nov and 12 C on 5 Nov. The entire trial area received a dormant treatment of glyphosate herbicide on about 10 Apr to control winter annual weeds. Following spring greenup, plots were rated on 26 May 92 for percentage of plots surface exhibiting symptoms of spring dead spot. Ratings were assigned for the entire trial twice by one observer; ratings for each plot were averaged to derive a single estimate of percentage spring dead spot. Data could be used from only four replicates, as the grass in one replicate had suffered severe trampling injury prior to data collection. Data were arcsine-transformed and subjected to ANOVA and the Waller-Duncan k-ratio multiple comparison test (P=0.05). Weather conditions were favorable for development of spring dead spot. The treatments tested provided no control of disease. Since other studies have shown some control of spring dead spot using September applications of fungicide, we suspect that failure to obtain significant control in this test was due to delaying the first aplications until 1 Oct 91, a condition dictated by the test site. No phytotoxicity was noted in the test." |
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| Language: | English |
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| References: | 0 |
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| Note: | Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P. C., J. D. Jr. Doney, A. J. Powell, and N. Tisserat. 1993. Control of spring dead spot on bermudagrass, 1991-92. Fungicide Nematicide Tests. 48:p. 359. |
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