Full TGIF Record # 2296
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1984.tb01699.x/pdf
    Last checked: 03/28/2012
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Publication Type:
Author(s):Wells, G. J.; Haggar, R. J.
Author Affiliation:Agricultural Research Council Weed Research Organization, Oxford, UK
Title:The ingress of Poa annua into perennial ryegrass swards
Source:Grass and Forage Science. Vol. 39, No. 4, December 1984, p. 297-303.
# of Pages:7
Publishing Information:Oxford, Blackwell Scientific Publications
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1984.tb01699.x/abstract
    Last checked: 03/28/2012
    Notes: Abstract only
Keywords:TIC Keywords: Poa annua; Lolium perenne; Cutting
Abstract/Contents:"The ingress of Poa annua into established swards of perennial ryegrass was recorded in four experiments aimed at determining whether ingress was due to P. annua aggression or to a decrease in ryegrass vigor. Emphasis was placed on severity of defoliation, effect of bare spaces and the time of year most favorable to colonization. In Experiment 1, P. annua ingress was greatest in the autumn, especially where ryegrass had been sown in rows rather than broadcast sown. In Experiment 2, seedlings of P. annua only established successfully in mature ryegrass swards that had been defoliated at intervals of two weeks. Experiment 3 showed that ingress was inversely related to the vigor of the ryegrass cultivar, being particularly high on frequently defoliated plots. In Experiment 4, which involved a study of the colonization of poached areas, more seedlings established in quadrats surrounded by P. annua-dominant pasture compared with patches surrounded by perennial ryegrass. It is concluded that P. annua is not an aggressive species; it colonizes only open ryegrass swards that have become weakened by intensive management."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wells, G. J., and R. J. Haggar. 1984. The ingress of Poa annua into perennial ryegrass swards. Grass Forage Sci. 39(4):p. 297-303.
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DOI: 10.1111/j.1365-2494.1984.tb01699.x
Web URL(s):
    Last checked: 03/28/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: SB 197 .B7
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