Full TGIF Record # 225568
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=202
    Last checked: 07/24/2013
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i
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Author(s):Mittlesteadt, T. L.; Willis, J. B.; Goddard, M. J. R.; Jester, J. J.; Askew, S. D.
Author Affiliation:Virigina Tech, Blacksburg
Title:Improving quality of bermudagrass post dormancy transition using partial ryegrass control techniques
Section:Weed management in turf
Other records with the "Weed management in turf" Section
Meeting Info.:Jacksonville, Florida: January 27-30, 2008
Source:2008 Proceedings, Southern Weed Science Society. Vol. 61, 2008, p. 106.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Control methods; Cynodon dactylon; Herbicide efficacy; Herbicide evaluation; Ryegrass control; Selective herbicides; Turfgrass quality
Abstract/Contents:"Removing perennial ryegrass (Lolium perenne) (PR) during spring transition of overseeded bermudagrass (Cynodon dactylon) often leads to thin turf with poor aesthetics. Efforts using low herbicide rates for PR control were not effective at improving turfgrass aesthetics. To improve turfgrass playing conditions during spring transition, we have developed a process that partially controls PR, stimulating bermudagrass growth. By applying selective herbicides with specially designed equipment, we control a minimal percentage of perennial ryegrass with little disruption to playing conditions or aesthetics. The resulting perennial ryegrass canopy disruption is scarcely noticeable to the average golfer or other client. These openings in the PR canopy stimulate bermudagrass to grow and increase bermudagrass cover in advance of the normal transition time. A randomized complete block trial with three replications was conducted at Farmington Country Club near Charlottesville, VA in 2006, and on the Virginia Tech golf course in 2007. Research studies included three herbicide application methods: drip, sponge, and strip. Treatments included two transition herbicides, foramsulfuron (Revolver at 29 g ai/ha) and trifloxysulfuron (Monument at 23 g ai/ha). The drip boom and sponge applicator were calibrated to kill 6-cm diameter circles on 10-cm centers. Calibrations were unique for each device and resulted in a solution delivery rate of 1,635 L/ha for drip, 1,402 L/ha for sponge, and 280 L/ha for strips. A factorial treatment arrangement evaluated four scenarios of each method: foramsulfuron at 30% coverage applied early, trifloxysulfuron at 30% coverage applied early, foramsulfuron at 30% coverage applied early and late, and foramsulfuron at 20% coverage applied early and late. A comparison treatment that did not receive partial control treatment was also included. For the 2006 study, partial control treatments were applied on April 26 (early) and May 18 (late) prior to a broadcast application of foramsulfuron at 29 g ai/ha on July 7. For the 2007 study, partial control treatments were applied on May 9 (early) and May 30 (late) prior to a broadcast application of foramsulfuron at 29 g ai/ha on July 10. Ratings included percent bermudagrass cover, and turfgrass quality at 0 degrees and 90 degrees on 1-9 scale. Data from the 2006 and 2007 studies show that partial control treatments increased bermudagrass cover at all rating times. In 2006 Sponge and drip treatments maintained at least a 7 color rating for the duration of the study. Plots that did not receive partial control had color slightly below acceptable (4.8) two weeks after the broadcast treatment of foramsulfuron. Bermudagrass cover at this timing was 68% in plots that did not receive partial control treatments and 82 to 95% in plots that did receive partial control treatments. In 2007 plots that did not receive partial control treatments contained 40% bermudagrass cover 1 week after the broadcast treatment of foramsulfuron. Plots that did receive partial control treatments ranged from 45 to 70% bermudagrass cover. Partial control appears to be an effective way to stimulate bermudagrass growth while having minimal impact on overall turfgrass quality. Future research will refine application equipment and determine optimal timing and percent partial control needed for best aesthetics during transition."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mittlesteadt, T. L., J. B. Willis, M. J. R. Goddard, J. J. Jester, and S. D. Askew. 2008. Improving quality of bermudagrass post dormancy transition using partial ryegrass control techniques. South. Weed Sci. Soc. Proc. 61:p. 106.
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http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=202
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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