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| Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1976.tb01114.x/epdf
Last checked: 10/02/2015
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| Author(s): | Oswald, A. K.;
Haggar, R. J. |
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| Author Affiliation: | ARC Weed Res. Org., Yarnton, Oxford OX5 1PF, UK |
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| Title: | The seasonal occurrence of Poa spp. seedlings in young ryegrass-white clover swards |
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| Source: | Journal of the British Grassland Society. Vol. 31, No. 1, 1976, p. 41-44. |
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| Keywords: | TIC Keywords: Poa; Lolium perenne; Trifolium repens; Poa trivialis; Poa annua
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| Geographic Terms: | UK |
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| Abstract/Contents: | A preliminary experiment on the invasion by Poa spp. of a 1-year-old ryegrass sward showed that peak numbers of seedlings occurred in September. Further confirmation was sought from three sites varying in average annual rainfall from 60 to 102 cm by digging turf cores at monthly intervals from April to November 1971. Counts of Poa spp. seedlings per 10.8-cm diameter core showed that the greatest number were present at the wettest site, but that at all sites peak numbers were recorded in September; secondary peaks also occurred in May at two of the sites. This knowledge is useful in determining when to combat the invasion by unsown species of young leys, using appropriate management methods for controlling sward density, including the use of selective herbicides. Associated counts of the tillers of sown and invading species showed that, on the wettest site, Poa spp. outnumbered Lolium perenne by approximately 150% before the ley was even 12 months old. During the 8-month recording period tiller density of Poa spp. did not increase further, but P. annua became replaced progressively by P. trivialis, and L. perenne tillers fell by nearly half. No sward deterioration occurred on the driest site, while at the intermediate site L. perenne decline was offset by a build up of Trifolium repens. From summary |
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| Language: | English |
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| Note: | Abstract of paper read at Winter Meeting of the British Grassland Society, December, 1975 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Oswald, A. K., and R. J. Haggar. 1976. The seasonal occurrence of Poa spp. seedlings in young ryegrass-white clover swards. J. Br. Grassland Soc. 31(1):p. 41-44. |
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| Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2494.1976.tb01114.x/epdf
Last checked: 10/02/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website
Notes: Item is within a single large file |
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MSU catalog number: SB 197 .B7 |
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