Full TGIF Record # 324934
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143613
    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Koo, Daewon; Vahidi, Milad; Goncalves, Clebson Gomes; Peppers, John; Shafian, Sanaz; Askew, Shawn D.
Author Affiliation:Koo: Presenting Author and Virginia Tech; Vahidi, Peppers, Shafian and Askew: Virginia Tech; Goncalves: University of California
Title:Does NDVI consistently assess plant response to herbicides?
Section:Turfgrass science poster
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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. 143613.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Visual rating is the most widely used method to assess herbicide injury of turfgrass. However, there is an increasing need for more objective data to supplement visual ratings due to their innate subjectivity. Normalized difference vegetation index (NDVI), although developed for measuring nitrogen stress, has been adopted to assess abiotic and biotic stress on turfgrasses (Bell et al. 2000; Brewer et al. 2016). Past observations suggest NDVI responses following herbicide injury may be mode-of-action (MOA) dependent, but more research is needed to test this theory. Two-year field studies were conducted in Blacksburg, VA. Six different rates of sulfosulfuron and topramezone were applied to 'L93' creeping bentgrass fairways. Visual ratings from trained observers were collected to assess herbicidal injury on turfgrass at 7 and 14 DAT. Normalized Difference Vegetation Index for each plot was collected by ground-based (Crop Circle ACS-430, Holland Scientific, Lincoln, NE) and aerial-based sensors (MicaSense RedEdge MX, Seattle, WA) at the same assessment timing. Linear regression slopes were generated for each replicate in each trial to relate visually observed injury to either ground- and aerial-based NDVI. Although the rates of herbicides used caused a similar range of visual green color loss, NDVI was poorly correlated to visually assessed herbicide injury, is reduced at a much lower rate compared to visual color, and was dependent on herbicide MOA in one of two years. In 2021, the slope of NDVI to visually estimated injury by sulfosulfuron was higher than that of topramezone regardless of ground- or aerial-based measurement. However, in 2022, there was no significant difference between slopes of NDVI to visually estimated injury for two herbicides, possibly due to other environmental error. The data suggests that NDVI could be used to supplement the visual ratings of herbicide injury, however, the relationship might vary depending on herbicide MOA and environment."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Koo, D., M. Vahidi, C. G. Goncalves, J. Peppers, S. Shafian, and S. D. Askew. 2022. Does NDVI consistently assess plant response to herbicides?. Agron. Abr. p. 143613.
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    Last checked: 01/24/2023
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