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| Web URL(s): | http://www.apsnet.org/publications/phytopathology/backissues/Documents/1991Articles/phyto81n10_1133.pdf#page=49
Last checked: 10/15/2015
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Nutter, F. W. Jr.;
Gleason, M. L.;
Jenco, J. H.;
Christians, N. C. |
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| Author Affiliation: | Department of Plant Pathology and Horticulture, Iowa State University, Ames |
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| Title: | Effect of visual, remote sensing, and image analysis assessment methods on intra-rater and inter-rater reliability estimates in the dollar spot-bentgrass pathosystem |
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| Source: | Phytopathology. Vol. 81, No. 10, October 1991, p. 1182. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Sclerotinia; Lolium; Agrostis
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| Abstract/Contents: | "Different amounts of Sclerotinia-infested ryegrass grain were used to inoculate a bentgrass green to establish a wide range of disease severities. Plots 1 m2 [m to the second power] were visually assessed by four raters using a 0 to 100 percentage scale. Reflectance values at 600 and 800 nm were also recorded from each plot using a hand-held radiometer. Color photographs were digitized and analyzed by the ISU Image Analysis Facility. Visual and remote sensing evaluation were repeated 24 hrs. later to obtain intra-rater reliability estimates. Correlations among raters were performed to obtain inter-rater reliability estimates. Intra-rater reliability estimates ranged from 98.0 to 99.5 % using the radiometric method as compared to 91.2 to 99.0 % using the visual scale. The reliability estimate for the image analysis method was only 80.1 %. Inter-rater reliabilities were highest for the radiometric method (99.2 to 99.8%) and were only slightly lower for the visual method (88.7 to 94.5%). However, the radiometric method had lower standard errors and less bias (slopes closer to 1.0) than the visual method." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Nutter, F. W. Jr., M. L. Gleason, J. H. Jenco, and N. C. Christians. 1991. Effect of visual, remote sensing, and image analysis assessment methods on intra-rater and inter-rater reliability estimates in the dollar spot-bentgrass pathosystem. Phytopathology. 81(10):p. 1182. |
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| Web URL(s):
http://www.apsnet.org/publications/phytopathology/backissues/Documents/1991Articles/phyto81n10_1133.pdf#page=49
Last checked: 10/15/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 599 .P48 |
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