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| Web URL(s): | http://www.apsnet.org/publications/phytopathology/backissues/Documents/1991Articles/phyto81n07_810.pdf#page=4
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): | Neher, Deborah;
Campbell, C. Lee |
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| Author Affiliation: | Dept of Plant Pathology, North Carolina State University, Raleigh, NC |
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| Title: | Theoretical underestimation of disease progress rates with maximum disease intensity less than 100 percent. |
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| Source: | Phytopathology. Vol. 81, No. 7, July 1991, p. 813. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Disease evaluation; Disease identification; Disease forecasting
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| Abstract/Contents: | "Most applications of disease progress models assume maximum levels of disease (K max) equal 100% or 1.0, but this is not always the case. Underestimation of the rate (r) of disease increase was calculated by comparing r with actual K max values (0.25-1.0) to that with an assumed K max=1.0 for 30-day epidemics with a range of initial disease (y - 0.01 to 0.0001) and standardized rates (r*). With a decrease in actual maximum levels of disease increasing underestimation or r occurred with the logistic, Gompertz, and monomolecular models, respectively, assuming K max=1.0. Increasing underestimation of r with increased r* increased the underestimation of r, occurred with the monomolecular, logistic and Gompertz models, respectively. When epidemic duration was 45 days, effects of decreased K max and increased r* increased the underestimation of r, especially for Gompertz and logistic models. The results highlight a potential problem in assuming K max=1.0 when the actual K max is less than 1.0." |
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| Language: | English |
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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):
Neher, D., and C. L. Campbell. 1991. Theoretical underestimation of disease progress rates with maximum disease intensity less than 100 percent.. Phytopathology. 81(7):p. 813. |
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| Web URL(s):
http://www.apsnet.org/publications/phytopathology/backissues/Documents/1991Articles/phyto81n07_810.pdf#page=4
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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