Full TGIF Record # 226247
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=512
    Last checked: 07/25/2013
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i
Report
Author(s):Mittlesteadt, T. L.; Goddard, M. J.; Willis, J. B.; Askew, S. D.
Author Affiliation:Turfgrass Weed Science, Virginia Tech, Blacksburg, VA
Title:Cultural and chemical methods to improve perennial ryegrass establishment in dense bermudagrass
Section:SWSS - Ph.D. Oral Paper Contest
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Meeting Info.:Orlando, Florida: February 9-12, 2009
Source:2009 Proceedings, Southern Weed Science Society. Vol. 62, 2009, p. 442.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Chemical management; Cultivar evaluation; Cultural methods; Cynodon dactylon; Establishment; Lolium perenne; Overseeding
Cultivar Names:Patriot
Abstract/Contents:"Bermudagrass (Cynodon sp.) is commonly used in the southern region of the United States and in the transition zone on golf courses and athletic fields. Its stoloniferous and rhizomatous growth habit allows for a turfgrass which provides excellent wear tolerance and recuperative ability. In the transition zone, bermudagrass enters dormancy in the fall leaving the turf brown. It is common for turf managers to overseed dormant bermudagrass with perennial ryegrass (Lolium perenne L.) to provide a green playing surface during the fall and winter months. Establishing perennial ryegrass in dense bermudagrass can be challenging due to thick verdure produced by aggressively growing bermudagrass species. It is difficult to obtain good seed to soil contact which is essential for establishing turfgrasses from seed. Therefore our objective is to evaluate different chemical and cultural treatments to improve establishment of perennial ryegrass in dense bermudagrass. Studies were conducted in Blacksburg, VA at the Glade Road Research Facility and at the Turfgrass Research Center on 'Patriot' bermudagrass. Overseeding dates were September 20, 2007 and October 2, 2008. Chemical and cultural treatments were applied one day prior to overseeding. Perennial ryegrass was seeded at 273 kg/ha pure live seed. A split-plot experimental design was used with two experimental factors. Factor A was cultural treatments and were randomly assigned to main plots. Factor B was chemical treatments and were randomly assigned to split plots within each whole plot. All treatments were replicated three times. Whole plots were 3 by 7m with each split plot being 1.8 by 3m. Cultural treatments included a nontreated check, topdressing with sand at a depth of 0.6 cm, following seeding, verticutting in one direction, verticutting in two directions, and core aerification in one direction combined with verticutting in two directions. Chemical treatments included a nontreated check, trinexapac ethyl at 194.3 g ai/ha, triclopyr at 627.6 g ai/ha, and triclopyr at 627.6 g ai/ha combined with mesotrione at 280 g ai/ha. In an attempt to simulate conditions that turf managers face when overseeding, traffic was applied to every plot weekly beginning 4 weeks after seeding using a traffic simulator. Visual ratings included percent perennial ryegrass cover and turf color. Percent perennial ryegrass cover was rated on a scale of 0 to 100%, where 0% is no perennial ryegrass cover and 100% is complete perennial ryegrass cover. Turf color was rated on a 1 to 9 scale, where 1 is poor and 9 is excellent and less than 5 indicates unacceptable turf. Percent perennial ryegrass cover was also assessed using line intersect counts with 100 intersections per plot. Turf color was also assessed using a Fieldscout TCM NDVI Turf Color Meter. Means were separated using Fisher's Protected LSD test at P=0.05 for perennial ryegrass cover and turf color. Results from the 2007 study indicate that cultural treatments had the most impact on perennial ryegrass establishment 1 MAT. Furthermore, combining chemical treatments with cultural treatments improved perennial ryegrass establishment in some cases, but color is sacrificed when triclopyr and mesotrione are used. Topdressing and core aerification in one direction combined with verticutting in two directions resulted in significantly more perennial ryegrass cover than other cultural treatments without sacrificing color. In 2008 no significant differences in perennial ryegrass cover could be detected between any of the cultural treatments or chemical treatments."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mittlesteadt, T. L., M. J. Goddard, J. B. Willis, and S. D. Askew. 2009. Cultural and chemical methods to improve perennial ryegrass establishment in dense bermudagrass. South. Weed Sci. Soc. Proc. 62:p. 442.
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http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=512
    Last checked: 07/25/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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