Full TGIF Record # 225275
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Web URL(s):http://www.ncwss.org/proceed/NCWSS-2010-Proceedings.pdf#page=28
    Last checked: 07/19/2013
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Author(s):Haguewood, John B.; Moss, Justin Q.; Smeda, Reid J.; Xiong, Xi
Author Affiliation:Haguewood, Smeda and Xiong: University of Missouri, Columbia, MO; Moss: Oklahoma State University, Stillwater, OK
Title:Management of annual bluegrass (Poa annua) with bispyribac sodium on creeping bentgrass
Section:Forestry/industrial/turf posters
Other records with the "Forestry/industrial/turf posters" Section
Meeting Info.:Lexington, Kentucky: 2010
Source:Proceedings of the 2010 North Central Weed Science Society 65th Annual Meeting. Vol. 65, 2010, p. 15.
# of Pages:1
Publishing Information:Champaign, Illinois: North Central Weed Science Society
Keywords:TIC Keywords: Agrostis stolonifera; Application rates; Bispyribac-sodium; Control methods; Herbicide resistance; Paclobutrazol; Phytotoxicity; Plant growth regulators; Poa annua control; Transition zone; Trinexapac-ethyl
Abstract/Contents:"Annual bluegrass (Poa annua L.) is a troublesome weed on creeping bentgrass (Agrostis stolonifera L.) putting greens. Bispyribac-sodium is an effective herbicide for annual bluegrass in creeping bentgrass fairways, but plant tolerance to the herbicide is reduced as mowing heights are reduced from fairway to green heights (12.5 to 3mm). The objective of this research was to determine if bispyribac-sodium applied in late spring/summer months in the transition zone can reduce annual bluegrass infestation over time without seriously reducing turf quality. Field trials were established on a golf course putting green in Columbia, Missouri in 2010, and were designed as a randomized complete block with four replications. Treatments included two rates of bispyribac-sodium (12.4 and 24.8 g ai ha-1). The lower rate was applied on 14 (6 total applications) and 21 day (4 applications) intervals, while the higher rate was applied every 28 days (3 applications). Treatments also included the addition of plant growth regulators (PGRs) paclobutrazol (224 g ai ha-1) and trinexapac-ethyl (57 g ai ha-1) every 28 days (3 applications). Bispyribac-sodium effectively controlled annual bluegrass to less than 10% incidence per plot during the fall, while the non-treated control plots had ~20% annual bluegrass infestation. During or after the treatment, turf quality was not affected by the low rate of bispyribac-sodium application, although transient yellowing was observed on plots that received the high rate of bispyribac-sodium. Addition of trinexapac-ethyl to bispyribac-sodium did not improve annual bluegrass control nor turf quality. Combinations of bispyribac-sodium and paclobutrazol resulted in the most effective control of annual bluegrass (<5% incidence); however addition of paclobutrazol resulted in turf phytotoxicity within 2 weeks of application. Results suggest that optimum management of annual bluegrass with the least impact of on turfgrass quality follows applications of bispyribac-sodium at rate of 12.4 g ai ha-1 on 14 or 21 day intervals."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Haguewood, J. B., J. Q. Moss, R. J. Smeda, and X. Xiong. 2010. Management of annual bluegrass (Poa annua) with bispyribac sodium on creeping bentgrass. Proc. North Cent. Weed Sci. Soc. 65:p. 15.
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    Last checked: 07/19/2013
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    Notes: Item is within a single large file
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MSU catalog number: SB 610 .N6
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