Full TGIF Record # 333520
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150235
    Last checked: 12/06/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Askew, Shawn D.; Godara, Navdeep; Romero, Juan Ramon; Koo, Daewon; Peppers, John
Author Affiliation:Askew: Presenting Author and Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA; Godara and Romero: Virginia Tech, Blacksburg, VA; Koo: Blacksburg, VA; Peppers: Crop, Soil and Environmental Science, Virginia Tech, Blacksburg, VA
Title:Alternative approaches to annual bluegrass control in dormant turf
Section:Turf pest management oral II
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C05 turfgrass science
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Meeting Info.:St. Louis, Missouri: October 29-November 1, 2023
Source:ASA, CSSA, SSSA International Annual Meeting. 2023, p. 150235.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Increasing incidence of herbicide resistant annual bluegrass and market desire for alternatives to synthetic pesticides has heightened research needs for organic weed control options in ornamental turf. Most organic weed control strategies involve nonselective treatments. One way to gain selectivity is to apply products during turfgrass dormancy. Studies were conducted in winter 2022 - spring 2023 to evaluate radiant heat, hot water, and vinegar treatments compared to glyphosate for annual bluegrass control in dormant zoysiagrass turf. None of the treatments injured zoysiagrass or impeded post-dormancy transition. Water heated to 95 C and sprayed at 61 KL ha-1 6 times at 2-wk intervals and Green Gobbler vinegar applied at 748 L ha-1 three times monthly reduced annual bluegrass cover 117 d after initial treatment (DAIT) equivalent to glyphosate applied once at 1.1 kg ai ha-1. Heating a 6-mm thick metal plate to 300 C and placing it 3.8 cm above turf for 15 sec reduced annual bluegrass cover to 5% 70 DAIT, but plants rapidly recovered when biweekly treatments ceased. The vinegar treatment was easier to implement than hot water and, although cost of the hot water treatment has not yet been calculated, chemical cost of the vinegar treatment is over $36,000 ha-1 compared to $50 ha-1 for glyphosate. These data suggest that hot water and vinegar can be effective tools for annual bluegrass control in dormant turf, but individual plant treatment of low-density escaped plants may be a better use for these tools compared to broadcast weed control. Radiant heat did not discolor dormant turf and its efficiency for weed control could be increased by moving the metal plate closer to turf or increasing exposure duration. Future studies will evaluate a more robust dose response to further elucidate potential viability of radiant heat for weed control in dormant turf."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Askew, S. D., N. Godara, J. R. Romero, D. Koo, and J. Peppers. 2023. Alternative approaches to annual bluegrass control in dormant turf. Agron. Abr. p. 150235.
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    Last checked: 12/06/2023
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