Full TGIF Record # 147106
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Web URL(s):http://www.turf.uconn.edu/pdf/research/reports/2006.pdf#page=105
    Last checked: 04/16/2009
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):McDonald, S. J.; Dernoeden, P. H.; Kaminski, J. E.
Title:Colonial, creeping, and velvet bentgrass tolerance to bispyribac-sodium
Section:Scientific publications (abstracts & citations)
Other records with the "Scientific publications (abstracts & citations)" Section
Source:2006 Turfgrass Research Report [Connecticut]. 2007, p. 92.
# of Pages:1
Publishing Information:Storrs, CT: Department of Plant Science, University of Connecticut
Keywords:TIC Keywords: Agrostis canina; Agrostis stolonifera; Agrostis tenuis; Bispyribac-sodium; Herbicide evaluation; Herbicide injury; Tank mix; Weed control
Abstract/Contents:"Bispyribac-sodium (BPS) is a relatively new herbicide that can be used to selectively remove annual (Poa annua L.) and roughstalk (P. trivialis L.) bluegrass from creeping bentgrass (Agrostis stolonifera L.). Although efficacious against the aforementioned weed species, applications of BPS generally result in unacceptable levels of yellowing to creeping bentgrass. Additionally, information with regards to the tolerance of other bentgrass species such as colonial (A. capillaris L.) and velvet (A. canina L.) to BPS is limited. The objectives of this study were to: 1) determine the relative tolerance of colonial, creeping and velvet bentgrass to BPS; and 2) assess the ability of a liquid iron plus nitrogen product to reduce or mask injury to the bentgrass species. This study was conducted at the University of Connecticut Plant Science Research and Education Facility located in Storrs, CT. Three areas were established in 2004 to either 'Southshore' creeping bentgrass, 'SR7200' velvet bentgrass, or 'SR7100' colonial bentgrass. All sites were mowed approximately 4 times per week to a height of 0.5 inches. BPS 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 50 gpa using a CO2 pressurized (35psi) sprayer equipped with a flat-fan nozzle. Treatments were applied on 13 and 27 June and 9 July. Plots were 5 ft x 5 ft and arranged in a randomized complete block with 4 replications. Bentgrass color was rated on a 0 to 10 scale where 0 = turf brown, 7.5 = minimum acceptable discoloration, and 10 = optimum green color. Injury was rated on 0 - 5 scale where 0 = no visible injury and 5 = entire plot brown or dead. One week after treatments were initiated, BPS applied alone discolored (5.0 to 7.1) all bentgrass species. Except for colonial bentgrass, discoloration from the aforementioned treatments generally remained unacceptable for 2 to 3 weeks following the last application, regardless of herbicide rate or number of applications. When applied to colonial bentgrass, BPS (both rates) resulted in severe discoloration on nearly all rating dates. On 7 of 8 rating dates, BPS tank-mixed with Fe + N resulted in similar or improved creeping bentgrass color (8.3 to 9.1) when compared to the untreated control (7.1 to 8.3). When applied to velvet bentgrass, the tank-mix combination resulted in acceptable to excellent turfgrass color on most rating dates. Although Fe + N was able to mask the discoloration of BPS on colonial bentgrass, application of the herbicide resulted in a significant reduction in stand density and overall reduction in turfgrass quality. The relative tolerance of the three bentgrass species to applications of BPS was creeping bentgrass = velvet bentgrass > colonial bentgrass. Tankmixing Fe + N with BPS resulted in improved color and quality of both creeping and velvet bentgrasses when compared to applications of the herbicide alone. BPS applied alone or in combination with Fe + N, however, proved too injurious to colonial bentgrass."
Language:English
References:0
Note:"Do not duplicate, reprint, or publish information within this report without the expressed written consent of the author(s)"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McDonald, S. J., P. H. Dernoeden, and J. E. Kaminski. 2007. Colonial, creeping, and velvet bentgrass tolerance to bispyribac-sodium. 2006 Turfgrass Res. Rep. [CT]. p. 92.
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Web URL(s):
http://www.turf.uconn.edu/pdf/research/reports/2006.pdf#page=105
    Last checked: 04/16/2009
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: b5428823~S39a
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