Full TGIF Record # 155231
Item 1 of 1
Web URL(s):http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t26.asp
    Last checked: 09/21/2009
    Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T026.pdf
    Last checked: 02/16/2017
    Requires: PDF Reader
Publication Type:
i
Report
Author(s):Smith, D. L.; Walker, N. R.
Author Affiliation:Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, Oklahoma
Title:Evaluation of fungicides for brown patch control in tall fescue/Kentucky bluegrass residential lawns in Oklahoma, 2008
Source:PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T026.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Azoxystrobin; Disease control; Festuca arundinacea; Fungicide efficacy; Fungicide evaluation; Myclobutanil; Poa pratensis; Propiconazole; Rhizoctonia blight; Rhizoctonia solani; Thiophanate-methyl; Triadimefon
Cultivar Names:Ryce; Rembrandt; Picasso; Masterpiece
Trade Names:Bayer Advanced Fungus Control; Fertilome Liquid Systematic Fungicide; Scotts Fungus Control; Spectracide Immunox Lawn Disease Control; Heritage
Abstract/Contents:"Plots were established at the Turfgrass Research Center located in Stillwater, OK. Plots were 3 ft wide and 8 ft long with 2 ft alleys between plots. The experimental design was a randomized complete block with five replicates. The turfgrass sward was a mature stand of a blend of tall fescue and Kentucky bluegrass planted on a Norge loam soil. Mowing height was 3-in. Irrigation was applied to maintain an environment favorable for the pathogen. Recommended maintenance practices were followed throughout the growing season. Plots were infested with R. Solani by uniformly spreading wheat grains colonized by the fungus over plots on 10 Jul and again on 24 Jul. Fungicides were applied preventatively or curatively. Fungicides readily available to homeowners were compared to the commercial fungicide, Heritage, and a non-treated check. Liquid fungicides were applied with a CO2 pressurized wheelbarrow sprayer equipped with TX8008 flat fan nozzles and calibrated to deliver 87 GPA or 2 gal/1000 ft2. Granular fungicides were pre-weighed and applied by hand. Preventative treatments were initiated on 3 Jul prior to symptom development and were applied four times at 14-day intervals. Curative treatments of fungicide were initiated on 31 Jul after symptoms of brown patch developed and were applied three times at 14-day intervals. Ratings of disease severity (percent of plot area with symptoms of brown patch), turfgrass stand (percent of plot area with living grass), and turfgrass quality (scale of 1 - 9 scale where 1 = no turf present, 5 = unacceptable turfgrass, 7 = acceptable turf, 9 = dense, dark color, thick stand of turfgrass) were taken at weekly intervals from 3 Jul to 4 Sep. Disease severity data were subjected to the area under the disease progress curve (AUDPC) transformation to account for season-long ratings. AUDPC, turf quality, and turf stand data were analyzed using ANOVA (α = 0.05). Multiple comparisons of means were performed using Fisher's test of protected least significant difference (α = 0.05). Statistical contrast statements were also used to compare pooled means of each fungicide used versus not spraying. Weather early in the evaluation was abnormally cool, with low humidity, and limited precipitation. Weather later in the evaluation was seasonably warm, very humid, with above average rainfall. Disease was highly variable among replicates. Highest mean levels of disease severity recorded ranged from 40% (4 Sep) for plots treated preventatively with Fertilome Liquid Systemic Fungicide 1.55L to 7% (4 Sep) for plots treated preventatively with Heritage 50WG. Disease severity was significantly higher for the preventative application of Fertilome Liquid Systemic Fungicide 1.55L than the non-treated check throughout the trial. Disease severity was numerically higher, but not significantly different, for curative applications of Fertilome Liquid Systemic Fungicide 1.55L and all applications of Scotts Fungus Control 2.3G, Spectracide Immunox Lawn Disease Control 2.0L, and Bayer Advanced Fungus Control 1G compared to the non-treated check. Disease severity was numerically lower, but not significantly different, for all applications of Heritage 50WG compared to the non-treated check. Turfgrass quality was highest for plots receiving preventative or curative applications of Heritage 50WG. Compared to the non-treated check, quality was significantly lower for plots treated with preventative and curative applications of Scotts Fungus Control 2.3G and preventative applications of Spectracide Immunox Lawn Disease Control 2.0L. Quality of all other treatments was similar to the non-treated check. Quality was considered unacceptable for all treatments, except preventative and curative applications of Heritage 50WG, curative applications of Bayer Advanced Fungus Control 1G, and the non-treated check. Compared to the non-treated check, turfgrass stand was significantly reduced in the preventative and curative applications of Scotts Fungus Control 2.3G. Turfgrass stands were not significantly different from the non-treated check for all other treatments."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, D. L., and N. R. Walker. 2009. Evaluation of fungicides for brown patch control in tall fescue/Kentucky bluegrass residential lawns in Oklahoma, 2008. PDMR: Plant Dis. Manage. Rep. 3:p. T026.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=155231
If there are problems with this record, send us feedback about record 155231.
Choices for finding the above item:
Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t26.asp
    Last checked: 09/21/2009
    Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T026.pdf
    Last checked: 02/16/2017
    Requires: PDF Reader
Find from within TIC:
   Digitally in TIC by record number.
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)