Full TGIF Record # 315087
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Web URL(s):https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/125432
    Last checked: 03/26/2021
Publication Type:
Content Type:Abstract or Summary Only
Author(s):Booth, Jordan; McCall, David S.; Zhang, Xunzhong; Goatley, James M.
Author Affiliation:Booth: Plant Pathology, Physiology, and Weed Science, Virginia Tech, Moseley, VA; McCall: Assistant Professor, School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA; Zhang: Res Assistant Professor, School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA; Goatley: Professor and Agronomist, School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA
Title:Evaluating impact of fall applications of Trinexapac-Ethyl on cold tolerance of ultradwarf bermudagrass
Section:Golf turf management poster (includes student competition)
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C05 turfgrass science
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Meeting Info.:November 9-13
Source:ASA, CSSA and SSSA International Annual Meetings. Vol. n/a, No. n/a, November 2020, p. 125432.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Related Web URL:https://scisoc.confex.com/scisoc/2020am/mediafile/Handout/ aper125432/BOOTH.CSSA.2020%20POSTER%20PRIMO%20FINAL%20Standard.pdf
    Last checked: 03/26/2021
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    Notes: Direct download
Abstract/Contents:Ultradwarf bermudagrass (UDB) [Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt-Davy] putting greens provide excellent playability in the Southern U.S. but are susceptible to lethal winter injury. The plant growth regulator, trinexapac-ethyl (TE), is utilized on UDB putting greens during the growing season to suppress vegetative growth and improve surface quality. We hypothesize that non-traditional, fall TE applications will improve cold tolerance of UDBs by reducing carbohydrate expenditure leading into dormancy. This study was designed to evaluate the impact of fall TE treatments on the cold tolerance of UDB in an early-winter freeze situation. Twenty-four Champion UDB plugs were planted in February 2020 in 15.3 cm pots. The UDB pots were maintained in a greenhouse at 18-35°C, receiving TE (0.22L ha-1) every 14 days. In July the UDB pots were randomized and placed into a modified chest freezer where light and temperature were regulated to mimic fall growing conditions. Twelve pots received TE (0.22L ha-1) every 14 days while 12 did not. After 12 weeks, replications of three untreated UDB pots and three TE UDB pots were exposed to -9.4°C for 4, 6, 8, and 10 hours respectively. Assumptions of zero hours (no damage) and 14 hours (lethal damage) were made based on previous studies. A 2x6 factorial design (Primo x hours at -9.4°C) was used for analysis. Pots were analyzed for percent green cover using digital image analysis (ImageJ, 2020) to evaluate cold-exposure damage. Post-exposure percent green cover was best modeled (JMP Pro 15) with a non-linear Gompertz, three parameter model. Regression analysis predicted a 50% mortality exposure point for Champion UDB under TE treatments of 9.84 hours at -9.4°C (r2=0.836) compared to 11.38 hours at -9.4°C (r2=0.671) for non-treated Champion UDB pots. These data suggest that fall applications of trinexapac-ethyl reduce cold tolerance of ultradwarf bermudagrass.
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
2020. Evaluating impact of fall applications of Trinexapac-Ethyl on cold tolerance of ultradwarf bermudagrass. Agron. Abr. n/a(n/a):p. 125432.
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    Last checked: 03/26/2021
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