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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2005.pdf#page=106
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | McDonald, S. J.;
Dernoden, P. H. |
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| Author Affiliation: | University of Maryland, College Park, MD |
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| Title: | Postemergence control of annual and roughstalk bluegrass in creeping bentgrass with bispuribac |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Capital Hilton, Washington, D.C.: January 3-6, 2005 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 59, 2005, p. 92. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Discoloration; Postemergence herbicides; Poa annua; Poa annua control; Poa trivialis; Weed control; Agrostis stolonifera; Bispyribac-sodium; Herbicide evaluation; Herbicide safety; Application timing; Application rates
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| Trade Names: | Velocity |
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| Abstract/Contents: | "Annual bluegrass (Poa annua L.) and roughstalk bluegrass (Poa. trivialis L.) are problematic weeds for golf course managers. Creeping bentgrass (Agrostis stolonifera L.) is a desirable species for golf course fairways because it can be mowed low, has an aggressive horizontal growth habit, and exhibits improved disease resistance when compared to perennial ryegrass (Lolium perenne L.). Infestation of annual and roughstalk bluegrass in creeping bentgrass fairways can be damaging to overall turf quality and playability, The selective postemergence removal of these two Poa spp. from bentgrass fairways is greatly needed, and would be valued throughout the mid-Atlantic region. Velocity (bispyribac-sodium) is a new herbicide with potential for use on golf course turf. Two studies were conducted to assess the effectiveness and safety of Velocity on a stand of creeping bentgrass infested with P. annua and P. trivialis. In the first study, the establishment of P. trivialis occurred naturally in a golf course fairway seeded in 1998 to a 'Providence + SR1020' blend of creeping bentgrass. The effectiveness of Velocity 80WP for the control of P. trivialis was assessed using different timings and rates as follows: 2 applications on a 14 day interval at 30 and 45 gr. ai/A; 3 applications on a 14 day interval at 20 and 30 gr. ai/A; and 4 applications on a 14 day interval at 20 gr.ai/A. Plots were 5 ft by 5 ft and were arranged in a randomized complete block with four replications. In the second study, three 6-inch diameter P. annua plugs were planted into each 5 ft by 5 ft plot of established 'Southshore' creeping bentgrass. Because Velocity can elicit yellowing or chlorosis in bentgrass, two rates as described below were applied alone or tank-mixed with Lesco's Chelated Iron Plus Micronutrients (Fe +N; 6 fl oz/1000 ft2) to determine if the Fe + N would mask the chlorosis. Treatments included: Velocity 80WP applied alone, three times on a 14 day interval at 20 or 45 g ai/A; and the same rates tank-mixed with Fe + N. Plots were arranged in a randomized complete block with three replications. Data were analyzed using SAS MIXED procedure and significantly different means were separated using Tukey's pretected least significant difference test at P<0.05. Velocity, at all rates and timings evaluated, was effective in controlling bith P. annua and P. trivialis. Velocity tank-mixed with Fe + N partially masked the discoloration elicited by Velocity. Bentgrass color, however, remained within an acceptable level in the Velocity-treated bentgrass turf throughout both studies. The Fe + N may have reduced the effectiveness of the lower rate of Velocity (20 g ai/A), because the reduction in P. annua (56 surviving plants/plot) was less than the same rate applied without Fe + N (7 surviving plants/plot); however, the difference was not significant. In both studies, injury to the creeping bentgrass was minimal and dissipated within 15 to 18 days." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McDonald, S. J., Dernoeden Dernoeden, and Dernoeden P. H. 2005. Postemergence control of annual and roughstalk bluegrass in creeping bentgrass with bispuribac. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 59:p. 92. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2005.pdf#page=106
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 57 |
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