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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Dernoeden, P. H.;
Fidanza, M. A.;
Zhang, M. |
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| Author Affiliation: | Department of Agronomy, University of Maryland, College Park , MD 20742 |
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| Title: | Brown patch control with BASF 490, Curalan and Sentinel, 1993 |
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| Source: | Fungicide and Nematicide Tests. Vol. 49, 1994, 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: Lolium perenne; Brown patch; Rhizoctonia solani; Disease control; Fungicide evaluation; Fungicides
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| Cultivar Names: | Caravelle |
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| Abstract/Contents: | "The materials were applied with CO2 pressurized (35 psi) sprayer calibrated to deliver 2.5 gal water per 1000 ft2 on 14 day intervals on those dates footnoted in the data table. Soil was a Chillum silt loam with a pH of 6.1 and 2.7% OM. Plots were 5 by 5 ft, and were arranged in a randomized complete block with four replicates. Percent of plot area blighted was visually assessed on a linear 0 to 100% scale where 0 = entire plot area green and 100 = entire plot area brown or blighted. Turf quality was visually determined on a 0 to 10 scale where 0 = entire area brown or dead; and , 10 = optomum greenness and density. Brown patch ratings exceeding 2% would be considered unacceptable control for a golf course fairway. Disease pressure was very low in Jun, was severe from 12 to 19 Jun, and was moderate thereafter. Turf developed yellow-orange spots in early Jul, but R. solani was not isolated from any fungicide-treated plots. Curuvlaria spp. were commonly isolated, but R. zeae was isolated from a small number of yellowed plants. Injury in Consan-treated plots appeared as a general browning of foliage caused by the chemical, which reduced turf quality for 1 to 2 wks following each application. The unknown injury in plots, other than those sprayed with Consan, was most conspicuous on 12 Jul in turf treated with the high rate of BASF 490. R. solani foliar mycelium first became evident in the study area on 5 Jul, and Curalan and Sentinel-treated plots exhibited little or no mycelial activity. Disease pressure was extremely severe from 5 through 19 Jul. On 12 Jul, unacceptable brown patch control was being provided by the lower BASF 490 rates (0.10 and 0.20 oz). Consan Triple Action 20L had no apparent fungicidal effects on R. solani, and may have encouraged injury by being somewhat phytotoxic. On 19 Jul, 14 days since the materials were last applied, all fungicides reduced blighting significantly but only Sentinel provided comercially acceptable control. Curalan provided good control, which was similar to the level of control provided by Sentinel. Disease activity subsided in late Jul, and data collected 3 Aug showed that the best control had been provided by Curalan (4.0 fl. oz) and Sentinel. Turf quality, as a result of good disease control, was highest in Curalan and Sentinel-treated turf, and poorest in plots treated with BASF 490 (0.10 oz), Consan or untreated plots." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract, with table, only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., M. A. Fidanza, and M. Zhang. 1994. Brown patch control with BASF 490, Curalan and Sentinel, 1993. Fungicide Nematicide Tests. 49:p. 359. |
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