Full TGIF Record # 317143
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/135201
    Last checked: 03/31/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Boyd, Adam; Sanz-Saez, Alvaro; Han, David Y.; Guertal, Elizabeth A.
Author Affiliation:Boyd, Sanz-Saez, and Guertal: Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL; Han: Department of Crop, Soil and Environmental Sciences, Auburn University, AL
Title:Effects of iron and zinc on the response of hybrid bermudagrass photosynthesis to the herbicide topramezone
Section:Turfgrass management and ecology poster (includes student competition)
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C05 turfgrass science
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 135201.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Topramezone is an excellent herbicide for difficult to control weeds, but resultant bleaching and necrosis of the desired turfgrass is not acceptable in turfgrass settings. It is known that chelated iron, iron sulfate, or zinc sulfate safens topramezone when mixed and applied to bermudagrass. Although safening occurs, the exact mechanism for this is not known. Thus, the objective of this project was to examine temperature/daylength and selected micronutrient effects on topramezone safening and physiological indicators. In the growth chamber, bermudagrass was subjected to summer (31.9/20.8┬░C day/night, 14 daylight hours) and fall (23.9/12.2┬░C day/night, 11.5 daylight hours) conditions commonly found in the southeast US. Within each season there were factorial combinations of topramezone and three nutrient sources: chelated iron/N, iron sulfate, and zinc sulfate. Tissue bleaching, total canopy photosynthetic efficiency, clipping yield, and pigment concentrations of chlorophyll a, chlorophyll b, and total carotenoids were measured at 0, 7, 14, 21, and 28 days after treatment. Applications of topramezone reduced total canopy photosynthetic efficiency, regardless of the temperature/daylength regime. Greatest reductions in pigment concentration occurred in chlorophyll a and total carotenoids, while effects on chlorophyll b were largely unchanged. Application of iron (but without N) in combination with topramezone to bermudagrass helps to stabilize tissue bleaching by increasing chlorophyll production, while the plant functions to metabolize the herbicide."
Note:This item is an abstract only!
"Poster #1243"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Boyd, A., A. Sanz-Saez, D. Y. Han, and E. A. Guertal. 2021. Effects of iron and zinc on the response of hybrid bermudagrass photosynthesis to the herbicide topramezone. Agron. Abr. p. 135201.
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    Last checked: 03/31/2022
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