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| DOI: | 10.1094/PDIS-08-14-0787-RE |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/full/10.1094/PDIS-08-14-0787-RE
Last checked: 06/16/2016
Access conditions: Item is within a limited-access website
http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS-08-14-0787-RE
Last checked: 06/16/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Dung, Jeremiah K. S.;
Alderman, Stephen C.;
Walenta, Darrin L.;
Hamm, Philip B. |
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| Author Affiliation: | Dung: Department of Botany and Plant Pathology, Central Oregon Agricultural Research Center, Oregon State University, Madras; Hamm: Department of Botany and Plant Pathology, Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston; Alderman: United States Department of Agriculture-Agricultural Research Service National Forage Seed Production Research Center, Corvallis; Walenta: Department of Crop and Soil Science, Union County Extension Center, LaGrande, OR |
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| Title: | Spatial patterns of ergot and quantification of sclerotia in perennial ryegrass seed fields in Eastern Oregon |
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| Section: | Research
Other records with the "Research" Section
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| Source: | Plant Disease. Vol. 100, No. 6, June 2016, p. 1110-1117. |
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| Publishing Information: | [Washington, D.C.]: Bureau of Plant Industry, U.S. Dept. of Agriculture |
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| # of Pages: | 8 |
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| Related Web URL: | http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-08-14-0787-RE
Last checked: 06/16/2016
Notes: Abstract only |
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| Keywords: | TIC Keywords: Claviceps purpurea; Disease control; Disease severity; Epidemiology; Ergot; Fungal diseases; Lolium perenne; Sclerotium; Seedheads
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| Abstract/Contents: | "Ergot, caused by Claviceps purpurea, is a major disease of perennial ryegrass grown for seed in eastern Oregon. The objective of this research was to quantify and describe the spatial patterns of ergot severity in each of three 50-ha commercial fields of perennial ryegrass grown for seed in 2012 and 2013. In total, 1,433 and 1,405 quadrats were sampled among the three fields in 2012 and 2013, respectively, and the percentage of quadrats with ergot ranged from 59 to 90%. The mean incidence of infected seed heads in each quadrat ranged between 13 and 29%, while mean severity in each quadrat ranged from 0.2 to 0.5 sclerotia per seed head. Significant autocorrelation and clustering were observed in all three fields in both years, as indicated by Moran's I and spatial analysis by distance indices of aggregation. The mean number of ergot sclerotia collected from each field after harvest ranged between 4 and 15 sclerotia m-2 in 2012 and 18 and 119 sclerotia m-2 in 2013. Sclerotia left in perennial fields after harvest are a significant source of inoculum that should be targeted for control. This is the first study to quantify spatial patterns of ergot in perennial ryegrass and provides insights into possible mechanisms that contribute to ergot etiology and epidemiology." |
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| Language: | English |
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| References: | 51 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dung, J. K. S., S. C. Alderman, D. L. Walenta, and P. B. Hamm. 2016. Spatial patterns of ergot and quantification of sclerotia in perennial ryegrass seed fields in Eastern Oregon. Plant Disease. 100(6):p. 1110-1117. |
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| DOI: 10.1094/PDIS-08-14-0787-RE |
| Web URL(s):
http://apsjournals.apsnet.org/doi/full/10.1094/PDIS-08-14-0787-RE
Last checked: 06/16/2016
Access conditions: Item is within a limited-access website
http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS-08-14-0787-RE
Last checked: 06/16/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2191617 |
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