Full TGIF Record # 42162
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Web URL(s):http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=58
    Last checked: 07/24/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Robinson, J. Cutler Jr.; Derr, Jeffrey F.
Author Affiliation:Superintendent, Bayville Golf Club, Va. Beach; Assoc. Prof., Hampton Roads Ag. Exp. Sta., Va. Beach, VA
Title:Control of poa annua in bentgrass putting greens
Meeting Info.:Williamsburg, VA; January 2-5, 1996
Source:Proceedings of the 50th Annual Meeting of the Northeastern Weed Science Society. Vol. 50, 1996, p. 58.
Publishing Information:College Park, MD: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Golf greens; Herbicide efficacy; Herbicide evaluation; Poa annua control
Abstract/Contents:"Annual bluegrass (Poa annua L.) tends to invade bentgrass (Agrostis palustris L.) golf putting greens wherever they are grown. Its ability to thrive at low mowing heights with frequent irrigation makes a golf putting green an excellent place for Poa annua establishment. Once established, Poa annua detracts form the aesthetic and playing characteristics of a golf green. The nature of this weed to exist both as perennial and annual biotypes as well as its proficiency at producing makes its control a challenge for golf course superintendents. Currently no product provides effective, safe, and complete control of existing Poa annua in bentgrass golr greens. A practice putting green at Elizabeth Manor Golf and Country Club in Portsmouth, Virginia was selected to receive treatments of plant growth regulators as well as herbicides. The facility receives over 50,000 rounds of golf per year and the practice putting green is particularly highly trafficked. The ensuing data from the treatments provides "real world" results. Treatments were applied to four foot by eight foot plots, replicated four times in a randomized complete block, and compared to the untreated control. The growth regulators applied were: 1 lb/gallon emulsifiable concentrate formulation of Primo applied at 0.09, 0.19, and 0.28 lbs ai/A, and a 50% wettable formulation of paclobutrazol applied at 0.25 lb ai/A. These treatments were applied on 4/19, 5/3, 5/19, 6/7, and 6/20/94. The results showed that Poa annua populations were not changed stastically nor was putting quality improved to a significant level with any plant growth regulator treatment. Herbicide treatments applied were ethofumesate applied alone at 0.5 and 0.75 lb ai/A on 10/23, 12/2/94, and 1/23/95. Two other treatments utilized combinations of dithiopyr and ethofumesate. Dithiopyr was applied at 0.05 lb ai/A on 10/12/94 and 1/23/95. Ethofumesate was applied to these plots at 0.5 or 0.75 lb ai/A on 10/12, 12/2/94, and 1/23/95. The treatments applied on 10/12/94 and 1/23/95 were applied as a tank mix. The use of ethofumesate plus dithiopyr was an effective and fairly safe control for Poa annua in bentgrass. While the reduction in Poa annua populations was not momentous through the rating period of October 1994 through April 1995 when compared to the increase in Poa annua in untreated plots, the treatment effects were significant. Plot treated with the highest rate of ethofumesate plus dithiopyr exhibited a temporary and slight reduction in bentgrass quality and color through the winter months. Poa annua populations in these plots decreased by 10% while populations in untreated plots through the same period increased by over 50%."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Robinson, J. C. Jr., and J. F. Derr. 1996. Control of poa annua in bentgrass putting greens. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 50:p. 58.
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http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=58
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 610 .N62 v. 50
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