Full TGIF Record # 148846
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Web URL(s):http://www.turf.uconn.edu/pdf/research/reports/2008.pdf#page=117
    Last checked: 06/09/2009
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Putman, A. I.; Kaminski, J. E.
Author Affiliation:Department of Plant Science and Landscape Architecture, University of Connecticut, Storrs, Connecticut
Title:Influence of bispyribac-sodium on brown patch
Section:Scientific publications (abstracts & citations)
Other records with the "Scientific publications (abstracts & citations)" Section
Source:2008 Turfgrass Research Report [Connecticut]. 2009, p. 114.
# of Pages:1
Publishing Information:Storrs, CT: Department of Plant Science, University of Connecticut
Keywords:TIC Keywords: Agrostis stolonifera; Agrostis tenuis; Bispyribac-sodium; Disease control; Disease severity; Herbicide efficacy; Herbicide evaluation; Rhizoctonia blight; Rhizoctonia solani
Cultivar Names:Allister
Abstract/Contents:"Bispyribac-sodium (BPS) can be used to selectively remove annual bluegrass (Poa annua L) and roughstalk bluegrass (Poa trivaialis L.) from creeping bentgrass (Agrostis stolonifera L.). Although unacceptable levels of yellowing often occur following the application of BPS, tank-mixing BPS with iron + N products have been shown to reduce or mask this discoloration. In addition to the ability to selectively control undesirable weed species, BPS has also been shown to reduce the incidence of dollar spot caused by Sclerotinia homoeocarpa F.T. Bennett. Limited information, however, is available regarding the positive or negative effects of BPS on other common turfgrass diseases. The objective of this study was to asses the influence of BPS and BPS tank-mixed with an iron + N product on brown patch (Rhizoctonia solani Kuhns) in colonial bentgrass (A. capillaris L.). This field study was conducted in 2007 at the University of Connecticut Plant Science Research and Education Facility in Storrs, CT. In September 2006, an area was seeded to 'Allister' colonial bentgrass. Turf was mowed 3 times per week to a height of 0.5 inches. Byspyribac-sodium was applied twice at 30 g ai/A or three times at 20 or 30 g ai/A. The aforementioned treatments were applied alone or in combination with Lesco's 12-0-0 Chelated Iron Plus Micronutrients (Fe + N at 6.0 oz/1000 ft2). All treatments were applied in 44 gpa using a CO2 pressurized (40 psi) sprayer equipped with a flat-fan nozzle. Treatments were applied on 10 and 24 July and 7 August. Plots measured 3 ft x 6 ft and were arranged in a randomized complete block with 4 replications. Brown patch severity was visually rated on a percent scale in which 0 = no brown patch symptoms visible and 100 = entire plot area affected by R. solani. Trace levels of brown patch were observed when treatments were initiated on 10 July. One week after treatment (WAT), brown patch severity was greater in plots receiving only BPS (19 to 25%), when compared to the untreated control (11%). By 24 July (2 WAT), all plots treated with BPS and BPS tank-mixed with Fe + N plots generally had greater levels of brown patch when compared to the untreated control. Brown patch severity peaked approximately 2 weeks after the second application of BPS (6 August). On 6 August, all BPS treatments contained between 23 and 34% brown patch and few differences existed among BPS treatments. All BPS treatments, however, had significantly greater levels of brown patch on 6 August when compared to the untreated control (11%). On 21 August, brown patch was greatest in plots receiving 3 applications of BPS or BPS tank-mixed with Fe + N at 30 g ai/A. Treatments in which BPS or BPS tank-mixed with Fe + N was applied twice or applied three times at 20 g ai/A had brown patch levels similar to the untreated control on 21 August. Results from this field study suggest that BPS may increase the severity of brown patch on highly susceptible turfgrass species such as colonial bentgrass and additional chemical management strategies may be necessary to adequately suppress disease symptoms."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Putman, A. I., and J. E. Kaminski. 2009. Influence of bispyribac-sodium on brown patch. 2008 Turfgrass Res. Rep. [CT]. p. 114.
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Web URL(s):
http://www.turf.uconn.edu/pdf/research/reports/2008.pdf#page=117
    Last checked: 06/09/2009
    Requires: PDF Reader
    Notes: Item is within a single large file
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