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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Kackley, K. E.;
Dernoeden, P. H. |
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| Author Affiliation: | Dept. of Agronomy, Univ. of Maryland, College Park, MD |
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| Title: | Brown patch control with MON 24004, 1990 |
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| Source: | Fungicide and Nematicide Tests. Vol. 46, 1991, p. 326. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Lolium perenne; Brown patch; Rhizoctonia solani; Diseases; Disease control; Fungicides; Fungicide evaluation
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| Abstract/Contents: | "This study was conducted on a mature stand of perennial ryegrass. Fungicides initially were applied before foliar blighting was observed on either 14, 28 or 42 day intervals on those dates footnoted in the data table. Fungicides were applied with a CO2 pressurized (36 psi) sprayer in 2.5 gal water per 1000 ft2. Rain (0.33 in.) occurred within 1 hr of the 19 Jun application, but no rain occurred within 24 hrs of any other spray date. Soil was a Chillum silt loam with a pH of 7.1 and 1.3% OM. Plots were 5 by 5 ft, and were arranged as a randomized complete block with four replications. Percent of plot area blighted was determined visually on a 0 to 100% scale. Overall quality was visually assessed on a 0 to 10 scale where 0 = brown or dead turf, and 10 = optimum greenness and density. Treatments with ratings that exceed 5% plot area blighted would be considered unacceptable control for a golf course fairway turf. Disease pressure was light to moderate from 20 Jun to 3 Aug. During Jul, most treatments provided marginally acceptable control of brown patch; however, in many cases disease ratings were not significantly different from those of the untreated plots. Mowing height was reduced from 2.5" to 1.5" on 6 Aug, which exposed lower canopy injury from R. solani resulting in higher injury ratings on 10 Aug. Between 10 and 18 Aug weather conditions were wet and overcast, and temperatures did not drop below 68F. At this time, brown patch became severe. Under these conditions, none of the treatments provided acceptable control of brown patch. Overall quality data obtained 24 and 31 Aug showed that Chipco 26019 had provided the best combination of brown patch control and overall quality." |
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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):
Kackley, K. E., and P. H. Dernoeden. 1991. Brown patch control with MON 24004, 1990. Fungicide Nematicide Tests. 46:p. 326. |
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