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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=428
Last checked: 07/16/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Koger, C. H.;
Bryson, C. T.;
Byrd, J. D. Jr. |
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| Author Affiliation: | Koger and Bryson: USDA-ARS, Southern Weed Science Research Unit, Stoneville; Byrd: Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS |
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| Title: | Effect of cogongrass (Imperata cylindrica) residues on bermudagrass (Cynodon dactylon) and Italian ryegrass (Lolium multiflorum) |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Houston, Texas: January 27-29, 2003 |
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| Source: | Proceedings: Southern Weed Science Society: 56th Annual Meeting. Vol. 56, 2003, p. 341. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon dactylon; Evaluations; Germination; Imperata cylindrica; Lolium multiflorum; Residues
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| Abstract/Contents: | "Cogongrass is a rhizomatous, perennial plant that is among the most troublesome weeds worldwide. It was introduced into the southern U.S. in the late 19th and early 20th centuries, and today, is an invasive weed in many coastal states of the southeastern United States. Cogongrass competes with other plant species for nutrients, light, water, and physical space in infrequently cultivated areas, roadways, forests, pastures, mining areas, pine plantations, parks, and other natural and recreational areas. Extensive research has been conducted on biological properties of cogongrass such as temperature and shade tolerance, reproductive characterization and capabilities, and growth potential. However, in formation on potential inhibitory effects of cogongrass residues on other plant species is lacking. The effects of foliage and root residues of cogongrass on germination and shoot and root growth of bermudagrass (BM) and Italian ryegrass (RG), two desirable grasses commonly found in similar areas as cogongrass, were investigated in greenhouse experiments. Ground residues of cogongrass foliage and roots were mixed separately at concentrations of 0, 0.25, 0.5, 1, 2, 4, and 8% (w/w) with 500 grams of sterilized sand in sterilized pots. Twenty-five seeds of common bermudagrass (BM) or Italian ryegrass (RG) were spread on top of cogongrass residue:sand mix in four pots for each residue concentration. Greenhouses were maintained at 30/21 C with 14-h photoperiod for BM and 22/15 C with 12-h photoperiod for RG. Pots were sub-irrigated as needed. Experimental design was a split-split plot in a randomized complete block with plant species as the main-plot, type of cogongrass residue as sub-plots, and residue concentration as sub-subplots with four replications. Experiments were repeated. Germinated seeds were counted 10 d after planting and plants were thinned to 3 plants/pot. Shoot and r oot biomass of BM and RG was recorded at 35 DAP. Germination and dry weight of shoot and root biomass data are presented as a percent of the untreated check. Data were subjected to polynomial regression and pseudo R2 values were calculated to determine the goodness-of-fit for individual loglinear regression lines. Both types of cogongrass residues reduced ge rmination of BM and RG, however BM was impacted more than RG. Germination of both species was reduced at the lowest concentrations (0.25%) of cogongrass foliage and root residues, and was as low as 3% of the untreated check for BM and 40% for RG at the 8% concentration of cogongrass root residues. Shoot and root biomass of BM and RG were reduced by foliage and root residue of cogongrass at similar levels, with little difference in the type of cogongrass residue. Shoot and root biomass of BM was as low as 6% and RG as low as 17 to 24% at the 8% concentration of cogongrass root residue. Both foliage and root residues of cogongrass may contain an allelopathic substance that elicits a competitive advantage for cogongrass by suppressing germination and seedling growth of desirable grasses." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Invasive weeds: Real or imagined threat?"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Koger, C. H., C. T. Bryson, and J. D. Jr. Byrd. 2003. Effect of cogongrass (Imperata cylindrica) residues on bermudagrass (Cynodon dactylon) and Italian ryegrass (Lolium multiflorum). South. Weed Sci. Soc. Proc. 56:p. 341. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=428
Last checked: 07/16/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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