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| Web URL(s): | https://www.crops.org/publications/cs/pdfs/36/6/CS0360061631
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| Publication Type:
| Refereed |
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| Author(s): | Fidanza, Michael A.;
Dernoeden, Peter H. |
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| Author Affiliation: | Department of Agronomy, University of Maryland, College Park, MD 20742 |
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| Title: | Brown patch severity in perennial ryegrass as influenced by irrigation, fungicide, and fertilizers |
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| Section: | Turfgrass Science
Other records with the "Turfgrass Science" Section
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| Source: | Crop Science. Vol. 36, No. 6, November/December 1996, p. 1631-1638. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Brown patch; Lolium perenne; Irrigation; Fungicides; Fertilizers; Time-of-day; Disease control; Cultural methods; Nitrogen fertilizers; Iprodione
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| Abstract/Contents: | "Brown patch (Rhizoctonia solani Kuhn) is a common and destructive disease of turfgrasses, but little information is available regarding its management by cultural practices. This 2-yr field study assessed the influence of irrigation, and N source alone or in combination with P and K on brown patch severity. Perennial ryegrass (Lolium perenne L. cv. 'Caravelle') was subjected to either morning or evening irrigation. Sodium nitrate, a quickly available non-soil reacting N source, was compared with sulfur-coated urea (SCU), a slowly available soil acidifying N source. Fertilizer treatments were applied three (May-September-October) and six (March-May-June-September-October-November) times annually, representing lower and higher N application rates, respectively. Forty-nine kilograms N per hectare were applied on each date for a total of 147 and 294 kg N ā»Ā¹ ā»Ā¹. Plots were split with one-half treated with iprodione [3-(3,5-dichlorophenyl)-IRN-(1-methylethyl)-2,4-dioxo-1- imidazolidine-carboxamide)] (3.1 kg ai ā»Ā¹) on an extended 21-d interval. In non-fungicide-treated plots, brown patch severity was consistently reduced with morning irrigation when compared with evening-irrigation. Non-fungicide-treated plots fertilized with SCU generally had lower blight than Na ā-treated plots, regardless of N rate. In the second year, brown patch was more severe in plots treated with the high N rate, and P (72 kg ā»Ā¹ ^D]^D1) and K (150 kg ^D]^D]1 ā»Ā¹) reduced blight for both N-sources in non-fungicide-treated plots. Sulfur-coated urea applied at the high N rate plus P and K resulted in blight levels equivalent to or less than low N. Fungicide-treated plots receiving the high rate of N from SCU plus P and K had the highest summer quality in both years. While low soil pH was weekly correlated (r=0.352) with less blight, the slow N release characteristics of SCU were probaly a more important factor in disease reduction than soil acidification. While brown patch severity was reduced by morning irrigation, SCU + P + K, and iprodione, an ecellent level of summer turfgrass quality was not achieved using the extended fungicide application interval." |
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| Language: | English |
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| References: | 44 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fidanza, M. A., and P. H. Dernoeden. 1996. Brown patch severity in perennial ryegrass as influenced by irrigation, fungicide, and fertilizers. Crop Sci. 36(6):p. 1631-1638. |
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Last checked: 08/05/2010
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Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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