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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Krouse, J. M. |
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| Author Affiliation: | Department of Agronomy, University of Maryland, College Park, MD 20742 |
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| Title: | Curative brown patch control with fungicides, 1994 |
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| Section: | Turf Grass Reports
Other records with the "Turf Grass Reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 50, 1995, p. 368. |
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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
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| Cultivar Names: | Caravelle |
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| Abstract/Contents: | "Fungicides were applied with a CO² pressurized (35 psi) sprayer equipped with a flat-fan (8010) nozzle, and calibrated to deliver 2.5 gal water per 1000ft₂. Treatments were applied initially on 20 Jun when mean blight damage ranged from 1 to 5% per plot. The fungicides were reapplied on 5 Jul. Soil was a Chillum silt loam with a pH of 6.2 and 2.7% OM. Turf was mowed to a height of 0.75 in., fertilized with 3.0 lb N/1000ft₂/yr, and irrigated to prevent drought stress. Plots were 5 x 5 ft, and were arranged in a randomized complete block with four replicates. Percent of plot area blighted was assessed visually on a linear 0 to 100% scale where 0 = no blight and 100 = entire plot area blighted. Blight ratings exceeding 5% would be considered unacceptable for a golf course fairway. Disease pressure was initially moderate, but reached the severe level by mid-Jul. One week following treatment blight ratings increased slightly in fungicide-treated plots, but then declined during a break in the weather between 5 and 12 Jul. On 5 Jul (date of second spray) and 12 Jul, all treatments were providing acceptable brown patch control. By 19 Jul (14 days after second spray), Aliette + Fore-treated plots had become severely blighted, but Chipco 26019-treated turf was marginally acceptable. ProStar + Bayleton, however, provided excellent control as late as 22 days following (i.e. 27 Jul) the second spray. Residual control of Chipco 26019 had dissipated by 27 Jul. On 2 Aug, blight ratings were unacceptable in all treated plots, and data did not vary significantly from untreated plots." A table is presented which includes information regarding treatment and rate per thousand square feet as well as percentage of plot area blighted by R. solani, categorized by date. |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #358
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. M. Krouse. 1995. Curative brown patch control with fungicides, 1994. Fungicide Nematicide Tests. 50:p. 368. |
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