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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1986/9233,%20Michigan%20State,%20Branham.PDF
Last checked: 01/30/2015
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Branham, Bruce; Gaussoin, Roch |
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| Author Affiliation: | Department of Crop & Soil Science, Michigan State University, East Lansing, Michigan |
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| Monograph Title: | The Effect of Seven Management Factors and Their Interaction on the Competitive Ability of Annual Bluegrass and Creeping Bentgrass: [1986 Annual Progress Report], 1986. |
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| Publishing Information: | East Lansing, Michigan: Department of Crop & Soil Science, Michigan State University |
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| # of Pages: | 13 |
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| Collation: | [13] pp. |
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| Abstract/Contents: | "A three year study was completed in the fall of 1986 measuring the effects of five cultural practices on the competition between annual bluegrass and creeping bentgrass maintained under fairway conditions. The five cultural practices were irrigation (daily at 75% replacement of open pan evaporation (OPE), 3x/week at 110% OPE, and irrigation at wilt), clippings removed or returned, nitrogen fertility level (2 lb N/M/YR or 6 lb N/M/YR), plant growth regulator treatment (mefluidide 1/8 lb/A, fluriprimidol 1.0 lb/A and a control) and overseeding with 'Penncross' creeping bentgrass or no overseeding. The results show that clipping removal is the single most important factor, in terms of increasing creeping bentgrass populations, of the variables studied. Over a three year period removing clippings resulted in a 22.6% decrease in annual bluegrass where as returning clippings resulted in a 9.5% decrease. The other significant main effect was bentgrass overseeding. While not significant over any single year, when averaged over three years overseeding resulted in a highly significant 18.1% decrease compared to a 14.1% decrease without overseeding. Lowered nitrogen fertility resulted in a significant annual bluegrass decline in one of the three years however when averaged over all three years no effect was seen due to lowered N fertility. This points to a significant effect due to environmental interactions. Neither plant growth regulator treatment nor irrigation treatment played a significant role in annual bluegrass reduction. Another study was concerned with the effects of compaction (compaction and no compaction) and coring (no coring, coring 1x/YR, and coring 3x/YR) on annual bluegrass and creeping bentgrass competition. Over a two year period compaction resulted in significantly more annual bluegrass in the compacted plots than in plots receiving no compaction. Compacted plots saw a 6.1% decrease in annual bluegrass compared to a 16.3% decrease for non-compacted plots. A separate two year study compared flurprimidol rates and timings has shown no significant effects on the competition between annual bluegrass and creeping bentgrass. All of these studies confirm a previously held principle that creeping bentgrass is a more aggressive species than annual bluegrass. This is seen in our studies where we quantitatively measure the distribution of these species and in each year the overall species composition increases by several percentage points in favor of creeping bentgrass. However, because of annual bluegrass's unique ability to reseed itself, it can rapidly fill in any void left from disease, insect or other damages. Clipping removal is the best method for reducing annual bluegrass from fairway turf." |
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| Language: | English |
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| References: | 2 |
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| See Also: | See also related summary article "The effect of seven management factors and their interaction on the competitive ability of annual bluegrass and bentgrass" Annual Turfgrass Research Report [USGA/GCSAA], 1986, p. 4-5, R=9233. R=9233 |
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| Note: | "November 1, 1986"
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 01/30/2015
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