Full TGIF Record # 104679
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Web URL(s):https://www.plantmanagementnetwork.org/pub/trial/bctests/reports/2004/T002.pdf
    Last checked: 11/09/2016
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Publication Type:
i
Report
Author(s):Butler, E. L.; Tredway, L. P.
Author Affiliation:Department of Plant Pathology, North Carolina State University, Raleigh, North Carolina
Title:Evaluation of Serenade AS for control of dollar spot in creeping bentgrass, 2003
Source:Biological and Cultural Tests for Control of Plant Diseases. Vol. 19, 2004, p. [1-2].
Publishing Information:St. Paul, MN: The American Phytopathological Society
# of Pages:2
Keywords:TIC Keywords: Product profile; Dollar spot; Disease control; Diseases; Agrostis stolonifera; Fungicides; Fertilization; Biological fungicides; Fungicide combinations; Propiconazole; Application timing; Bacillus subtilis
Trade Names:Banner Maxx; Serenade AS
Abstract/Contents:"Serenade AS, a biological fungicide containing the bacterium Bacillus subtilis, was assessed for its ability to control dollar spot when applied alone, in rotations, or in tank-mixtures with Banner Maxx. This trial was conducted at North Carolina State University Turfgrass Field Lab in Raleigh, NC on 'Crenshaw' creeping bentgrass maintained under golf course purring green conditions. Mowing was performed three times weekly at a height of 0.157 in. with clippings collected, and the site was irrigated to prevent drought stress. Fertilizer was applied as 24-5-10 on 9 Apr (0.5 lb N/1000 sq ft) and as 18-3-18 on 5 May (0.5 lb N/1000 sq ft). Insect pests were suppressed with Dursban (1.5 fl oz/1000 sq ft) on 16 May, 27 Jun, and 25 Jul with Talstar (0.25 fl oz/1000 sq ft) on 18 Aug. Canteen wetting agent (6 fl oz/1000 sq ft), was applied on 24 Apr, 12 May, 24 Jun, and 1 Aug to control localized dry spot. Plots were 3.33 ft x 5 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 2 gal per 1000 sq ft with a CO2 powered sprayer at 40 psi using TeeJet 8004 flat fan nozzles. All treatments were initiated on 2 Apr. Fungicides were reapplied at the appropriate intervals as indicated in the table. Dollar spot incidence was assessed by counting the total number of infection centers in each plot on 26 Apr, 28 Apr, 30 Apr, 2 May, 5 May, 9 May, 13 May, 20 May, and 24 May. Turfgrass quality was evaluated on 24 May, using a 1 to 9 scale (9=best, 5=acceptable) based on color, density, and uniformity. Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t test (k=100). The first symptoms of dollar spot were observed on 25 Apr. Disease pressure was severe throughout spring 2003 due to prevailing wet and overcast conditions. No treatments provided significant control of dollar spot until 30 Apr, when Serenade (2% v/v) alternated with Banner MAXX (1 fl oz), Serenade (2% v/v) tank mixed with Banner MAXX (0.5 fl oz), and Banner MAXX (1 fl oz) alone exhibited fewer dollar spot infection centers than the untreated control. This trend continued until 20 May, when Serenade (2% v/v) alone joined the group of treatments with dollar spot incidence significantly lowered than the untreated control. Plots treated with Serenade (1% v/v) were characterized by higher than the untreated control on 24 May. These results indicate the Serenade AS, when applied at the 2% v/v rate, has a suppressive effect on dollar spot development in creeping bentgrass. The influence of Serenade AS in rotations and tank-mixtures with Banner MAXX could not be assessed, since Banner MAXX alone provided excellent dollar spot control throughout the trial."
Language:English
References:0
Note:Reprint appears in 2003 Pathology Reports [North Carolina State University], 2003, p. [1-2]
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, E. L., and L. P. Tredway. 2004. Evaluation of Serenade AS for control of dollar spot in creeping bentgrass, 2003. Biol. Cult. Tests Control Plant Dis. 19:p. [1-2].
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https://www.plantmanagementnetwork.org/pub/trial/bctests/reports/2004/T002.pdf
    Last checked: 11/09/2016
    Requires: PDF Reader
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