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| Web URL(s): | http://www.apsnet.org/publications/phytopathology/backissues/Documents/1994Articles/phyto84n05_541.pdf#page=3
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): | Fidanza, M. A.;
Dernoeden, P. H. |
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| Author Affiliation: | Department of Agronomy, University of Maryland, College Park, MD |
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| Title: | A Rhizoctonia blight severity model for perennial ryegrass |
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| Meeting Info.: | Joint Meeting of the APS Potomac and Northeastern Divisions: Held: February 9-11, 1994, Carlisle, PA |
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| Source: | Phytopathology. Vol. 84, No. 5, May 1994, p. 543. |
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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: Lolium perenne; Brown patch; Disease evaluation; Models
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| Abstract/Contents: | "A field study was initiated in 1991 to determine environmental conditions favorable for Rhizoctonia blight (R. solani Kuhn) in perennial ryegrass (Lolium perenne), and to develop a model to predict disease severity. Environmental conditions monitored were ambient air temperature, relative humidity (RH), precipitation, leaf wetness duration, soil temperature, soil moisture, and soil irradiance. A visual estimate of percent plot area covered with R. solani mycelium was used to determine moderate, high, and very high disease severity levels. A very high disease severity index required > or = 9 hours of RH > or = 95% with a minimum and average air temperature of > or = 22 and > or = 24C, respectively, with > or = 6 hours of RH > or = 95% or > or = 6 hours of RH > or = 90% plus precipitation > or = 8 mm. A moderate disease severity index was associated with minimum and average air temperature of > or = 17 and > or = 19C; respectively, with > or = 3 hours of RH > or = 95% or > or = 3 hours of RH > or = 90% plus precipitation > or = 8 mm. Disease severity was predicted with > or = 83% accuracy. In 1993, the model was field evaluated and a 30% reduction in fungicide use was achieved when compared to applying a fungicide on a 14-day schedule." |
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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):
Fidanza, M. A., and P. H. Dernoeden. 1994. A Rhizoctonia blight severity model for perennial ryegrass. Phytopathology. 84(5):p. 543. |
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| Web URL(s):
http://www.apsnet.org/publications/phytopathology/backissues/Documents/1994Articles/phyto84n05_541.pdf#page=3
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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