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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Fidanza, M. A. |
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| Author Affiliation: | Dept. of Agronomy, Univ. of Maryland, College Park, MD |
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| Title: | Preventative control of summer patch, 1991 |
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| Source: | Fungicide and Nematicide Tests. Vol. 47, 1992, p. 304. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Festuca rubra subsp. rubra; Summer patch; Magnaporthe poae; Preventive control
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| Abstract/Contents: | "This study was conducted on a Sep 1990 seeded stand maintained at 2.0 inches in height. Fungicides were applied applied prior to visual blighting on 3 Jun and all plots were retreated on 1 Jul. Symptoms appeared on/or about 8 Jul. Fungicides were applied with a CO2 pressurized (36 psi) sprayer equipped with an 801OE tee jet nozzle in 2.5 gal water per 1000 ft2. Plot area was irrigated 24 hrs after each application, and turf was frequently irrigated to prevent drought stress. Soil was a Chillum silt loam with a pH of 6.8 and 1.4% OM. Plots were 5 by 5 ft, and were arranged in a randomized complete block with four replications. Percent of plot area blighted was determined visually on a 0 to 100% scale. Overall quality was assessed visually on a 0 to 10 scale where 0 = brown or dead turf, and 10 = optimum greenness and density. Weather conditions were ideally hot for the disease in Jul, and frequent thundershowers and irrigation provided the environment conducive to severe summer patch damage. Summer patch blight data collected 16 and 26 Jul, and 1 Aug showed that all treatments (except EXP 10021 at 3.0 fl. oz on 26 Jul) had significantly reduced disease damage. Disease pressure, however, was so severe that no treatment provided an excellent level of control. Best summer patch control, and therefore highest turfgrass quality, was observed in Banner and EXP 10064B + Chipco 26019 (1.5 + 2.0 oz.)-treated plots. Relatively good summer patch control and turf quality also were provided by EXP 10064B (3.0 fl. oz), SAN 619 (0.33 oz), Lynx + Bayleton (1.0 + 2.0 oz), Lynx (1.0 oz) and Bayleton (4.0 oz)." |
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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):
Dernoeden, P. H., and M. A. Fidanza. 1992. Preventative control of summer patch, 1991. Fungicide Nematicide Tests. 47:p. 304. |
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