Full TGIF Record # 74473
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Web URL(s):http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=98
    Last checked: 07/24/2013
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Hart, S. E.; Lycan, D. W.
Author Affiliation:New Jersy Agricultural Experiment Station, Cook College, Rutgers University, New Brunswick, NJ
Title:Annual bluegrass control and seedhead suppression with ethofumesate
Section:Turfgrass and plant growth regulators section
Other records with the "Turfgrass and plant growth regulators section" Section
Meeting Info.:Boston Marriott Cambridge, Cambridge, MA: January 2, 3, 4, and 5, 2001
Source:Proceedings of the 55th Annual Meeting of the NortheasternWeed Science Society. Vol. 55, 2001, p. 98-99.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: Poa annua control; Seedhead inhibition; Ethofumesate; Agrostis stolonifera; Lolium perenne; Application rates
Abstract/Contents:"Field experiments were conducted in 2000 at Rutgers University Experimental Horticultural Farm II in New Brunswick, NJ and Riverton Golf Country Club in Riverton, NJ to evaluate spring and summer applications of ethofumesate for control of annual bluegrass and seedhead supression [suppression] in golf course fairways. At Horticultural Farm II the creeping bentgrass (Agrostis palustris 'Southshore') fairway was infested with approximately 40-50% annual bluegrass while the fairway at Riverton was an unknown variety of perennial ryegrass (Lolium perenne) infested with approximately 50-60% annual bluegrass. Ethofumesate applications were initiated on March 30 and April 2 at Riverton and Horticultural Farm II, respectively, and applied 8 times at approximately 3-4 week intervals throughout the spring and summer. The ethofumesate treatments consisted of two applications at 0.75 lb ai/A followed by six applications at 0.5, 0.38 or 0 lb/A, or 8 applications applied at 0.5 or 0.38 lb/A. One application of 0.5 lb/A paclobutrazol, applied in early May, was also evaluated for control of annual bluegrass. In the seedhead suppression experiment, single and sequential applications of ethephon were applied at 0.75 lb/A. A single application of mefluidide at 0.12 lb/A was included as a standard comparison. All ethofumesate applications were applied with 4.8 kg/h of urea, using a CO2 backpack sprayer delivering 80 GPA. In the seed head suppression study, a single application of ethofumesate provided 69-75% seed head suppression 7 WAT. Increasing the rate of ethofumesate did not significantly increase seed head suppression. However, applying a sequential application of ethofumesate increased seedhead suppression by 10-20%. Single and sequential applications of ethephon provided 76 and 86% seed head suppression, respectively. Mefluidide provided 96% seed head suppression at 4 WAT but seed head suppression fell to 73% at 7 WAT. In the annual bluegrass study at Riverton, annual bluegrass populations in check plots declined 25% by June, stabilized in the summer, and increased back to spring levels in late September. Two applications of ethofumeste [ethofumesate] at 0.75, 0.5, and 0.38 lb/A provided 45-55, 42, and 16% reductions in annual bluegrass populations by June. Summer applications of ethofumesate did not further reduce annual bluegrass populations by 52% by June. By late September annual bluegrass populations increased in all treatments, but the extent of this increase was less in the ethofumesate treatments than in the untreated check and the pacobutrazol [paclobutrazol] treatment. At Horticulture Farm II, annual bluegrass populations in the check plots remained stable throughout the spring and summer. Two applications of ethofumeste [ethofumesate] 0.75, 0.5, and 0.38 lb/A provided 18-22, 18 and 9% reductions in annual bluegrass populations by June. Summer applications of ethofumesate did not further reduce annual bluegrass populations. Turf quality of bentgrass in the ethofumesate treatments remained equal to the untreated check, regardless of ethofumesate rate or number of applications. A single application of paclobutrazol reduced annual bluegrass populations 25% by June. In late September annual bluegrass populations increased in all treatments and equaled levels observed in early spring."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hart, S. E., and D. W. Lycan. 2001. Annual bluegrass control and seedhead suppression with ethofumesate. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 55:p. 98-99.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=98
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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