Full TGIF Record # 225153
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=195
    Last checked: 07/18/2013
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Publication Type:
i
Report
Author(s):Estes, A. G.; McCarty, L. B.
Author Affiliation:Clemson University, Clemson, SC
Title:Selective annual bluegrass control in cool season turf with Velocity (bispyribac-sodium)
Section:Weed management in turfgrass
Other records with the "Weed management in turfgrass" Section
Meeting Info.:Charlotte, North Carolina: January 24-26, 2005
Source:Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 120.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Agrostis; Bispyribac-sodium; Cool season turfgrasses; Golf fairways; Herbicide efficacy; Herbicide evaluation; Poa annua control; Postemergence herbicides; Selective weed control
Trade Names:Velocity
Abstract/Contents:"Annual Bluegrass (Poa annua) a widely distributed prolific seed producer, with a tufted growth habit and nonuniform color makes for an unsightly appearance in highly maintained turf areas. Traditionally, selectively controlling annual bluegrass post-emergently in cool-season grasses has been obscure The purpose of this research was to investigate the efficacy of Velocity (bispyribac-sodium) for annual bluegrass control in overseeded perennial ryegrass and bentgrass fairways. In the spring of 2004, two studies were conducted by Clemson University, evaluating annual bluegrass control with Velocity. The first study, which was located in Pickens, SC at "The Rock at Jocassee" golf course, was conducted on bermudagrass fairways overseeded with perennial ryegrass at 300 lbs/A maintained at 0.5 inches. The second study, which was at "Wade Hampton Golf Club", was conducted on a creeping bentgrass fairway maintained at 0.5 inches. Plot size for each treatment measured 2.0 m by 3.0 m, replicated three times. Treatments were applied using a CO2 backpack sprayer calibrated at 20 GPA, at 30 p.s.i., with 8003 flat fan spray tips. Treatments for study one included: Velocity 80 WSP at 0.022 (lb ai/a), 0.033, 0.066, 0.099, and 0.132 applied in either February, March, and/or April and Prograss 1.5 EC applied at 1.5 lb ai/a in February and/or March. Treatments for study two included: Velocity at 0.066 lb ai/a and 0.132 lb ai/a applied in April, May, and/or June; along with, Trimmit (2SC) at 0.375 lb ai/a, Primo Max (1L) at 0.086 lb ai/a, Primo Maxx + Cutless (50WP) at 0.039 lb ai/a and 0.156 lb ai/a, Proxy (2L) at 3.4 lb ai/a all applied in April and May. Visual annual bluegrass control and seedhead control ratings were taken throughout the study along with perennial ryegrass and creeping bentgrass phytotoxicity. Ratings for annual bluegrass control and seedhead control were based on a scale of 0-100% with 0% representing no control and 100% representing complete control. Ratings for perennial ryegrass and creeping bentgrass phytotoxicity were on a 0- 100% scale with 0% representing no turf injury and 100% representing dead turf. On the overseeded perennial ryegrass study, 98 percent control of annual bluegrass followed 2 applications 4 weeks apart starting in Mid February at 0.099 lb ai/a or a 2 week split application 3 times at 0.066 lb ai/a starting in Mid February. Perennial ryegrass phytotoxicity throughout study was less than 15 percent, for all treatments. On the creeping bentgrass study, 100 percent control followed 2 week split applications 3 times at 0.066 lb ai/a and 0.132 lb ai/a starting in Mid May. Creeping bentgrass phytotoxicity was less than 17 percent. Dollar spot disease was reduced following Velocity treatments in the creeping bentgrass study. Future research, at Clemson University, will be to investigate the use of various fertilizers such as N and Fe in conjunction with Velocity, to potentially reduce ryegrass phytotoxicity. Evaluate timing rates for optimum annual bluegrass control. Investigate further Velocity's potential to reduce dollar spot."
Language:English
References:0
Note:"The changing world of weed science"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Estes, A. G., and L. B. McCarty. 2005. Selective annual bluegrass control in cool season turf with Velocity (bispyribac-sodium). South. Weed Sci. Soc. Proc. 58:p. 120.
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http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=195
    Last checked: 07/18/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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