Full TGIF Record # 324901
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    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Henry, Gerald M.; Tucker, Kevin
Author Affiliation:Henry: Presenting Author and University of Georgia-Athens; Tucker: University of Georgia-Athens
Title:Long-term control of annual bluegrass in creeping bentgrass with cumyluron
Section:Turfgrass Pest Management Poster: Diseases, Insects, Weeds II
Other records with the "Turfgrass Pest Management Poster: Diseases, Insects, Weeds II" Section

C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 143673.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Annual bluegrass (Poa annua L.) is one of the most problematic weeds in turfgrass. However, few herbicides are available for safe, efficacious control of annual bluegrass in creeping bentgrass. Research was conducted on a 'Penn A-4' creeping bentgrass putting green at The Orchard Golf and Country Club in Clarkesville, GA from 2020 to 2022. The putting green was maintained at a height of 0.3 cm and had a recurrent annual bluegrass infestation of approximately 50% cover. Herbicides were applied with a CO2 backpack sprayer calibrated to deliver 1,219 L ha-1 at 241 kPa. Treatments were initiated on 22 September 2020 and consisted of cumyluron (0.5, 1.1, and 2.2 kg ai ha-1), methiozolin at 0.5 kg ai ha-1, and bensulide at 14.3 kg ai ha-1. Sequential applications were made in October and the following spring for two consecutive years, depending on treatment. A non-treated check was included for comparison. Annual bluegrass control 10 weeks after initial treatment (WAIT) was greatest in response to methiozolin (86%), while all other treatments resulted in ≤ 45% control. Annual bluegrass control increased in response to cumyluron at the highest rate (2.2 kg ai ha-1) 33 WAIT resulting in 58% control, while control with methiozolin remained at 86%. At 66 WAIT, control was 100% in response to methiozolin and 86% in response to cumyluron at 2.2 kg ai ha-1. Annual bluegrass control 80 WAIT remained the same for methiozolin and cumyluron at 2.2 kg ai ha-1, while control was reduced to ≤ 65% for the lower cumyluron rates. Bensulide never resulted in > 13% annual bluegrass control during the duration of the experiment. Although excellent annual bluegrass control was achieved with methiozolin and cumyluron at 2.2 kg ai ha-1, control with methiozolin may have been exacerbated by the presence of shade on the putting green."
See Also:Updated version appears in Proceedings of the Southern Weed Science Society 76th Annual Meeting, Vol. 76, p. 186, R=333864. R=333864
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., and K. Tucker. 2022. Long-term control of annual bluegrass in creeping bentgrass with cumyluron. Agron. Abr. p. 143673.
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