Full TGIF Record # 11024
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Web URL(s):https://dl.sciencesocieties.org/publications/aj/pdfs/79/5/AJ0790050929
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Publication Type:
i
Refereed
Author(s):Cooper, R. J.; Henderlong, P. R.; Street, J. R.; Karnok, K. J.
Author Affiliation:Dept. of Plant and Soil Science, Univ. of Massachusetts, Amherst, MA; Dept. of Agronomy, Univ. of Georgia, Athens, GA.; and Dept. of Agronomy, Ohio State University, Columbus, OH.
Title:Root Growth, Seedhead Production, and Quality of Annual Bluegrass as Affected by Mefluidide and a Wetting Agent
Source:Agronomy Journal. Vol. 79, No. 5, September/October 1987, p. 929-934.
Publishing Information:Washington: American Society of Agronomy
# of Pages:6
Keywords:TIC Keywords: Root growth; Seed production; Seedhead inhibition; Quality; Poa annua; Mefluidide; Wetting agents; Growth regulators; Golf greens
Abstract/Contents:"Annual bluegrass [Poa annua ssp. reptans (Hauskins) Timm.] often comprises a large portion of golf course greens, yet its shallow root system and extensive seedhead production limit its turf quality. The purpose of this investigation was to determine if annual bluegrass seedheads could be suppressed and rooting enhanced by the plant growth regulator mefluidide [N-(2,4-dimethyl-5- {[(trifluorome-thyl) sulfonyl] amino} phenyl) acetamide] and the wetting agent Aqua-Gro (polyoxyethylene esters and ether of cyclic acid and alkylated phenols, silicone anti-foam emulsion). Chemicals were applied prior to seedhead emergence during 1983 and 1984 to annual bluegrass grown in a rhizotron in fine quartz sand. Root elongation of mefluidide-treated annual bluegrass was superior to the control for 2 to 4 weeks following Spring 1983 application. Maximum rooting depth of mefluidide-treated turf was significantly greater than that of Aqua-gro-treated or untreated turf during May 1983. Aqua-Gro applied at either 4.2 or 8.4 L ha-1 generally did not affect rooting. In 1983, mefluidide (0.07 or 0.14 kg ha-1) prevented seedhead emergence throughout the entire seedhead production period (approx. 8 weeks) when applied under environmental conditions favoring uptake. Leaf tip yellowing occurred for 3 to 4 weeks following mefluidide application. Mefluidide-treaed turf, however, exhibited quality superior to untreated turf for approx. 6 weeks following discoloration. Aqua-Gro provided little seedhead suppression and recoloration. Aqua-Gro provided little seedhead suppression and reduced quality for about 10 days following application. In 1984, environmental conditions were not conducive to chemical uptake so 1983 results were not corroborated. Mefluidide appears promising as an annual bluegrass management tool; however, more information is needed to determine the influence of environmental conditions on mefluidide uptake and its ability to suppress seedheads and enhance rooting at low rates."
Language:English
References:20
See Also:Other items relating to: PGRS

Other items relating to: Wetting Agents
Note:German summary appears in Zeitschrift für Vegetationstechnik, 3/88 p. 135
Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cooper, R. J., P. R. Henderlong, J. R. Street, and K. J. Karnok. 1987. Root Growth, Seedhead Production, and Quality of Annual Bluegrass as Affected by Mefluidide and a Wetting Agent. Agron. J. 79(5):p. 929-934.
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https://dl.sciencesocieties.org/publications/aj/pdfs/79/5/AJ0790050929
    Last checked: 12/09/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: S 22 .A45
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