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Publication Type:
| Report |
Author(s): | Dernoeden, P. H.;
Davis, D. B. |
Author Affiliation: | Department of Agronomy, University of Maryland |
Title: | Control of Brown Patch in Perennial Ryegrass, 1987 |
Source: | Fungicide and Nematicide Tests. Vol. 43, 1988, p. 283. |
Publishing Information: | St. Paul: American Phytopathological Society |
Keywords: | TIC Keywords: Lolium Perenne; Brown Patch; Rhizoctonia solani; Fungicides
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Abstract/Contents: | "Fungicides were applied to a spring, 1987 seeded stand of perennial ryegrass when active R. solani mycelium was observed on lower leaf sheaths, but prior to blighting of foliage. Soil was a silt loam with a pH of 7.3 and O.M. 1.7%. Fungicides were applied 2, 16 and 29 Jun 87 with a CO2 pressurized sprayer in 2.5 gal per 1000 ft sq. No rain fell within 48 hr of fungicide application and soil moisture was maintained at levels preventing drought stress throughout the test period. Plots were 5 x 5 ft and were arranged in a randomized complete block with four replications. Percent of plot area blighted was visually determined on a 0 to 100% scale. Ratings exceeding 4.0% plot area blighted would be considered unacceptable on golf course fairway turf. Blighting of turf in untreated plots became severe by 26 Jun, however, all treatments except Daconil 2787 (2.0 oz/1000 ft sq)were providing excellent control on 26 Jun and 3 Jul. On 10 Jul, Rizolex (1.3 oz/1000 ft sq) and Chipco (1.0 oz/1000 ft sq) had begun to show signs of reduced effectiveness; whereas, unacceptable control was being provided by the low rate of Daconil 2787. By 17 Jul, only Chipco 26019 (2.0 oz/1000 ft sq), Daconil 2787 (4.0 oz/1000 ft sq) and Rizolex + Chipco 26019 were providing acceptable brown patch control." |
Language: | English |
References: | 0 |
Note: | Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Dernoeden, P. H., and D. B. Davis. 1988. Control of Brown Patch in Perennial Ryegrass, 1987. Fungicide Nematicide Tests. 43:p. 283. |
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