Full TGIF Record # 324902
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/145002
    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Elmore, Matthew T.; VanDyke, Adam; Tuck, Daniel P.
Author Affiliation:Elmore: Presenting Author and Rutgers University; VanDyke: Professional Turfgrass Solutions LLC; Tuck: Rutgers University
Title:Effect of spring ethephon timing on annual bluegrass seedhead suppression programs initiated in late fall
Section:Turfgrass Pest Management Poster: Diseases, Insects, Weeds II
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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. 145002.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"The objectives of this research were to determine whether late fall ethephon applications provide practitioners more flexibility to time spring applications and determine if two winter ethephon applications provide more control than one winter application. Replicate field experiments were conducted during winter 2021 to 2022 in North Brunswick, New Jersey and Salt Lake City, Utah on annual bluegrass putting greens. Six treatments consisted of one or two winter ethephon applications followed by a traditional two-application spring ethephon program initiated at 200, 400, or 600 GDD (Base 32Ā°F). All treatments received one winter ethephon application in December prior to snowfall, termed pre-snow. Treatments receiving a second winter application, termed post-snow, were treated between late January and early February. A standard two-application spring program (initiated at 400 GDD) and a non-treated control were included for comparison. Ethephon was applied at 3.8 kg ha-1 and tank-mixed with trinexapac-ethyl for both spring applications. Seedhead suppression relative to the non-treated control and turfgrass quality were evaluated visually in springtime. Area under the seedhead progress curve (AUSPC) was calculated using data from all assessments. Data were subjected to ANOVA in SAS (v9.4). Fisher's Protected LSD (P = 0.05) was used to separate means. Contrast statements tested the effect of post-snow applications. At both locations, programs initiated at 200, 400, or 600 GDD provided similar suppression on most dates and AUSPC values were not different. Pre-snow + post snow programs provided more suppression than pre-snow programs on most dates at both locations according to contrast statements. In Utah but not New Jersey, contrast statements performed on AUSPC data found more suppression from pre-snow + post snow programs compared to pre-snow only programs. Applying ethephon in early winter (pre-snow) and early winter + late winter (post-snow) appears to give the superintendent flexibility to time the first spring application."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Elmore, M. T., A. VanDyke, and D. P. Tuck. 2022. Effect of spring ethephon timing on annual bluegrass seedhead suppression programs initiated in late fall. Agron. Abr. p. 145002.
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