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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2001.91.6.S1#page=72
Last checked: 10/16/2015
Requires: PDF Reader
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): | Pfender, W. F.;
Seguin, S. G. |
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| Author Affiliation: | USDA-ARS NFSPRC |
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| Title: | Prediction of stem rust infection severity in perennial ryegrass, based on overnight and post-sunrise degree-hours of moisture duration |
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| Meeting Info.: | 2001 APS/MSA/SON Joint Meeting, Salt Lake City, Utah: August 25-29, 2001 |
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| Source: | Phytopathology. Vol. 91, No. 6, June Supplement 2001, p. S72. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Puccinia graminis subsp. graminis; Infection; Disease severity; Lolium perenne; Time-of-day; Weather; Moisture
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| Abstract/Contents: | "Infection of perennial ryegrass (Lolium perenne) by Puccinia graminis subsp. graminicola occurs during the night and early morning. To determine the relationship between weather conditions and infection severity, plants were inoculated with a standardized urediniospore suspension and placed outdoors overnight; temperature and leaf wetness were recorded at 30-minute intervals. The experiment was conducted weekly from March-July in 1998 and 1999. From these data, we developed a model based on the physiological time (degree-hours above 1.5 C) during which leaves were wet. The model is a form of the Hill equation. It uses wetness degree-hours during the 150 min. after sunrise, and the square root of night time (dark) wetness degree hours, to predict the logarithm of number of infections per standard leaf area. Data for two additional seasons, Sept.-November 1999 and March-July 2000, were used to evaluate the model." |
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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):
Pfender, W. F., and S. G. Seguin. 2001. Prediction of stem rust infection severity in perennial ryegrass, based on overnight and post-sunrise degree-hours of moisture duration. Phytopathology. 91(6):p. S72. |
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| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2001.91.6.S1#page=72
Last checked: 10/16/2015
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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