Full TGIF Record # 63540
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Walker, R. H.; Belcher, J. L.; Higgins, J. M.
Author Affiliation:Agronomy and soils department, Alabama Agricultural Experiment Station, Auburn University, AL 36849-5412
Title:Rimsulfuron: Potential for use in sports turf
Section:Posters
Other records with the "Posters" Section
Meeting Info.:52nd Annual Meeting, Greensboro, NC, January 25-27, 1999
Source:Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 251.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Poa annua; Poa annua control; Cynodon dactylon; Spring transition; Rimsulfuron; Sports turf; Herbicide resistance; Herbicide injury; Herbicide evaluation; Weed control; Surfactants; Golf greens; Lolium perenne; Chlorosis; Poa trivialis; Application rates; Application timing; Injuries
Cultivar Names:Tifdwarf
Abstract/Contents:"Control of annual bluegrass (Poa annua L.) and its biotypes in overseeded bermudagrass (Cynodon dactylon L.) turf and the removal of overseeded species to improve transition in the spring are necessary management practices for sports-turf managers in the South. Preliminary research showed that rimsulfuron has potential to be used for the above purposes. Small-plot, replicated field studies were conducted at Auburn during the spring of 1998 with the objective of evaluating `Tifdwarf' bermudagrass tolerance and weed control efficacy of rimsulfuron as affected by rate and non-ionic surfactant (NIS). Two bermudagrass sites on native sandy loam soil and managed as a golf putting green were used. Rates of 0, 0.016, 0.032, 0.048 and 0.064 lb.ai/A, with and without NIS at 0.25% v/v were evaluated for control of annual bluegrass and perennial ryegrass (Lolium perenne L.). All applications were made using a CO₂ sprayer and a water volume of 30 GPA. NIS improved annual bluegrass control only when rimsulfuron was applied at the two lower rates. Rimsulfuron plus NIS for all rates provided ≥95% control of this species 22 days after overseeding (DAO). Control of perennial ryegrass ranged from 90 to 94% with the three higher rates and was not affected by NIS. Bermudagrass injury was acceptable for all treatments and did not exceed 12%. Injury was in the form of chlorosis and slowed growth. Two experiments on sites identical to the above were conducted fall 1998 with the objective of evaluating annual bluegrass control and effects on overseeded roughstalk bluegrass (Poa trivialis L.) and/or perennial ryegrass. At site 1, rimsulfuron (0.048 lb. ai/A) plus NIS was applied alone either 4, 2 or 1 week before overseeding. Rimsulfron was also applied with fenarimol-based treatments where fenarimol (1.37 lb. ai/A) was applied both 4- and 2-weeks prior to overseeding and rimsulfuron was included at either the 4- or 2-week interval. Overseeding was done on 16 October. Results showed that fenarimol applied 4 weeks before overseeding followed by rimsulfuron plus fenarimol 2 weeks before overseeding provided 90% annual bluegrass control 10 DAO; this declined to 78% at 82 DAO. Rimsulfuron applied 2 weeks before overseeding provided 70% control 10 DAO and 75% 82 DAO. No injury to perennial ryegrass was evident when the interval between application and overseeding was either 2 or 4 weeks. At site 2, rimsulfuron at rates ranging from 0.008 tp 0.064 lb. ai/A plus NIS were applied 30 October to control emerged annual bluegrass prior to overseeding 7 days later (6 November) with roughstalk bluegrass and perennial ryegrass. Rimsulfuron provided 87 to 99% annual bluegrass control 38 DAO with rate ≥0.016 lb. ai/A. Only slight and temporary injury to roughstalk bluegrass was observed. Less injury to overseeded species at this site was probably due to the later planting."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Walker, R. H., J. L. Belcher, and J. M. Higgins. 1999. Rimsulfuron: Potential for use in sports turf. South. Weed Sci. Soc. Proc. 52:p. 251.
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