Full TGIF Record # 178511
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Web URL(s):https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T024.pdf
    Last checked: 11/14/2016
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Report
Author(s):Vincelli, P.; Dixon, E.; Williams, D.; Burrus, P.
Author Affiliation:Vincelli and Dixon: Dept. of Plant Pathology; Williams and Burrus: Dept. of Plant and Soil Science, University of Kentucky, Lexington, KY
Title:Efficacy of fungicides for control of dollar spot in a mixed creeping bentgrass/Poa annua soil-based green, 2010
Section:Turfgrass
Other records with the "Turfgrass" Section
Source:PDMR: Plant Disease Management Reports. Vol. 5, 2011, p. T024.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:3
Keywords:TIC Keywords: Agrostis stolonifera; Disease control; Dollar spot; Fungicide efficacy; Fungicide evaluation; Golf greens; Poa annua; Sclerotinia homoeocarpa
Cultivar Names:Penncross
Abstract/Contents:"The test was conducted on a Maury silt loam located at the University of Kentucky Turf Research Center near Lexington. The turf was maintained at 0.188-in. mowing height and fertilized with 18-9-18 at the rate of 1.5 lb N/1,000 sq ft on 6 Oct 09 and 1.0 lb N/1,000 sq ft on 12 Apr 10. Plots measured 4 ft x 4 ft with 2-ft borders, and were arranged in a randomized complete-block design with three replications. Fungicide sprays were applied using a CO2-pressurized hand-held sprayer fitted with Spraying Systems 8003E flat-fan nozzles delivering 1.5 gal/1,000 sq ft. Treatments were first applied on 19 May, after dollar spot was first detected, with the remaining treatments applied according to the spray intervals indicated in the table (final application on 29 Jul). Where tank-mixes were rotated, sprays were applied every two weeks, with each tank-mix being applied once every four or six weeks. Visual counting of dollar spot infection centers was performed weekly. Selected, representative data are provided due to space constraints. The level of infestation by Poa annua was visually estimated on 4 May, when color differences between the two grass species and the presence of P. annua seed heads facilitated discrimination. The amount of P. annua per plot averaged 45 percent and did not differ significantly between treatments. Transformed data (log10) were analyzed using ANOVA (alpha=0.05) and Waller-Duncan k-ratio t-test (k=100). Although statistics provided are based on analysis of transformed data, arithmetic means are presented in order to provide a better indication of the level of disease control provided by each treatment as well as the overall disease pressure in the trial. This reporting approach may lead to discrepancies between the rankings of treatments based on the arithmetic means and those based on the statistics provided in the table. Disease pressure was moderate to high in this test. Most treatments provided acceptable control of dollar spot for most of the duration of the test, with the exception of BPF1 and BPF2, and Daconil Ultrex at low rate w/o Rhapsody throughout the trial, as well as Disarm and Renown later in the summer. The addition of Rhapsody biological fungicide to the Daconil Ultrex 1.6 oz treatment did not significantly improve dollar spot control. There were no growth regulator or phytotoxicity effects seen during this test."
Language:English
References:0
Note:This item is as abstract and tables only!
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vincelli, P., E. Dixon, D. Williams, and P. Burrus. 2011. Efficacy of fungicides for control of dollar spot in a mixed creeping bentgrass/Poa annua soil-based green, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T024.
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https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T024.pdf
    Last checked: 11/14/2016
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    Access conditions: Item is within a limited-access website
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