Full TGIF Record # 324918
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/142628
    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Peppers, John; Askew, Shawn D.
Author Affiliation:Peppers: Presenting Author and Virginia Tech; Askew: Virginia Tech
Title:Endothall: A potential new mode of action for annual bluegrass control in warm-season turfgrass
Section:Turf pest management oral III
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C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 142628.
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 instances of herbicide resistant annual bluegrass (Poa annua) has limited turfgrass managers options for chemical control. Endothall inhibits serine threonine protein phosphatase, which is a novel mode of action for warm-season turf. Although extensively evaluated and even registered in cool-season turf a few decades ago, endothall use in bermudagrass is largely unreported. Two field studies were established in spring of 2022 to evaluate bermudagrass safety and annual bluegrass control with endothall alone and in combination with other herbicides. One field study evaluated efficacy of endothall as affected by application timing. This study was arranged as a three by four factorial with three levels of application timing (fully dormant, 50% green, and 100% green) and four levels of herbicide (endothall applied at 560, 840, and 1120 g ai ha-1 and trifloxysulfuron applied at 27.8 g ai ha-1). The second study contained six treatments to evaluate annual bluegrass control with potential combinations of endothall and diquat or glufosinate in fully dormant bermudagrass. Green turf cover reduction was dependent on endothall rate and timing, and commercially acceptable at the low and middle rates when applied to fully green bermudagrass and all rates when applied to dormant turf. At 28 DAT, endothall controlled annual bluegrass >80% at all rates when applied to green or semi-green bermudagrass. However, no rate of endothall controlled annual bluegrass >80% when applied under colder, dormant turf conditions. In the combination study, endothall plus glufosinate controlled annual bluegrass greater than all other treatments at 28 and 42 DAT. No other treatment controlled annual bluegrass >80% in this study. Based on the results of these studies, endothall has the potential to be utilized for annual bluegrass control in bermudagrass turf before or after, but not during greenup."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Peppers, J., and S. D. Askew. 2022. Endothall: A potential new mode of action for annual bluegrass control in warm-season turfgrass. Agron. Abr. p. 142628.
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    Last checked: 01/24/2023
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