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| Publication Type:
| Report |
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| Author(s): | Vincelli, Paul;
Doney, Jack C.;
Powell, A. J. |
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| Author Affiliation: | Departments of Plant Pathology and Agronomy, University of Kentucky, Lexington, KY 40546-0091 |
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| Title: | Evaluation of fungicides for control of brown patch, 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. 379. |
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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; Fungicide evaluation; Disease control
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| Abstract/Contents: | "The test was conducted on a sward of perennial ryegrass on a Maury silt loam at the University of Kentucky Spindletop Farm. The turf was mowed at 0.50 in., irrigated as needed, and fertilized with 1.5 lb N/1000 ft₂ on 11 Nov 93 and with 1.0 lb N/1000 ft₂ on 19 May, 7 Jun and 12 Jul 94. Plots measured 4 ft by 4 ft with 2-ft borders and were arranged in a randomized complete block design with three replications. Sprays were applied using a CO²-powered, hand-held sprayer fitted with Spray Systems 8003E flat fan nozzles which delivered 2.5 gal/1000 ft₂. Control plots were treated with water. All treatments were applied during early AM hours on 1 Jun; subsequent applications were made following the schedules indicated in the table below. Actual spray dates were 1, 15 & 29 Jun, and 14 & 28 Jul. An application of Prostar 50WP on a curative schedule was made 29 Jun; no additional applications were made in that treatment. The center of each plot was inoculated by uniformly applying 0.2 oz dried, ground, Rhizoctonia solani-infested corn on 27 Jul. Percent of plot surface colonized by R. solani was estimated, and on 2 Aug quality measurements (1=poor quality, 9=excellent quality) were also taken. Appropriate transformations were used to meet ANOVA assumptions. On 21 Jun and again on 7 Jul, aggressive mycelial growth of R. solani and foliar infection were observed in several plots, in each case following an extended period of very warm weather. The 21 Jun outbreak was from natural inoculum alone; the 7 Jul outbreak was from both natural and applied inoculum. Both outbreaks were highly variable over the experimental area, which precluded meaningful treatment evaluations, and no statistically significant differences were detected. Also, we observed that the heavily fertilized and irrigated sward rapidly outgrew the foliar blighting observed, by replacement of blighted leaves with new growth. Significant differences due to treatment were detected only for quality ratings taken on 2 Aug but not on later dates. Control of foliar blighting due to brown patch probably accounts, in part, for the minimal difference in quality; however, control of minor levels of other diseases may also be involved. No phytotoxicity was noted in the test." Table with data regarding treatment and product per thousand square feet, frequency, and turfgrass quality is included. |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #369
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., J. C. Doney, and A. J. Powell. 1995. Evaluation of fungicides for control of brown patch, 1994. Fungicide Nematicide Tests. 50:p. 379. |
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