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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=192
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Teuton, T. C.;
Harrell, M. S.;
Main, C. L.;
Williams, D. W.;
Mueller, T. C. |
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| Author Affiliation: | Teuton and Mueller: University of Tennessee, Knoxville, TN; Harrell and Williams: University of Kentucky, Lexington, KY; Main: Clemson University, Florence, SC |
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| Title: | Investigation of handheld chlorophyll meters for turfgrass evaluation |
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| Section: | Weed management in turf grass
Other records with the "Weed management in turf grass" Section
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| Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
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| Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 119. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Chlorophyll meters; Chlorosis; Color; Evaluations; Turfgrass quality
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| Abstract/Contents: | "Turfgrass quality, color, and other factors such as chlorosis are often used as indicators of overall turfgrass health. However, there is high variability within and among these factors due to the subjective nature of evaluators. The use of a hand-held chlorophyll meter has increased but their scientific validity has not been widely accepted. The objectives of the research were 1) determine if hand-held chlorophyll meter indices correlate with subjective evaluations of color and quality of three varieties of Kentucky bluegrass (Poa pratensis L.) and (P. arachnifera Torr. x P. pratensis L.) and two varieties of tall fescue (Festuca arundinaceae Schreb.), 2) establish if chlorophyll meters could detect differences between grass species/varieties, 3) determine the number of chlorophyll meter readings needed for diminishing returns to minimize CVs, and 4) determine if chlorophyll meters could be used to quantify turfgrass injury on Kentucky bluegrass. Apollo, Dura Blue, Dynasty, KY 31, and Thermal Blue were evaluated for color, quality, and CM-1000 indices (800 observations for each grass) at the University of Tennessee trial gardens and plant science farm in Knoxville, TN in 2004. In a separate experiment at the plant science farm in 2004 and 2005, Thermal Blue was treated with clethodim, fluazifop, diclofop-methyl, and sethoxydim at 1/2, 1 and 2x the normal use rates and injury, quality, and CM-1000 indices were recorded. Pearsons correlation coefficient for color and quality were linear in relationship to chlorophyll index (r=0.81, p<0.0001 and r=0.82, p<0.001). The number of observations required to minimize the CV for any grass type was determined to be >80 observations. However, many researchers may choose to use only 5 to 10 observations since all grasses had coefficients of variation of < 7.6% for 5 observations. Chlorophyll meters were able to detect herbicide injury. However, visual injury data had lower LSD values at the 5% level of significance. Chlorophyll meters will not take the place of visual observations, however they an easy, effective tool to use for objective measurements and may produce less variation among evaluators." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Vision for the future"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Teuton, T. C., M. S. Harrell, C. L. Main, D. W. Williams, and T. C. Mueller. 2006. Investigation of handheld chlorophyll meters for turfgrass evaluation. South. Weed Sci. Soc. Proc. 59:p. 119. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=192
Last checked: 07/18/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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