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| Web URL(s): | http://www.apsnet.org/publications/plantdisease/backissues/Documents/1993Articles/PlantDisease77n10_1020.PDF
Last checked: 08/27/2010
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Alderman, S. C.;
Churchill, D. B.;
Bilsland, D. M. |
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| Author Affiliation: | Alderman: Research Plant Pathologist; Churchill: Agricultural Engineer, United States Department of Agriculture - Agricultural Research Service, National Forage Seed Production Research Center; Bilsland: Senior Faculty Research Assistant, Bioresouce Engineering Department, Oregon State University, Corvallis, Oregon |
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| Title: | A vacuum collection and seed separation technique for enumeration of sclerotia of Claviceps purpurea in perennial ryegrass fields |
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| Source: | Plant Disease. Vol. 77, No. 10, October 1993, p. 1020-1022. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Claviceps purpurea; Lolium perenne; Sclerotium; Ergot; Seed collection
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| Abstract/Contents: | "A portable electric wet-dry shop vacuum run by a gas-powered generator was used to collect sclerotia of Claviceps purpurea from 1-m2 areas in a commercial field of perennial ryegrass. Sclerotia were separated from soil and straw residue using an air-screen (seed separation) machine, in which samples were partitioned based on particle width and thickness, and terminal velocity. The procedure also was used to determine the number of sclerotia in bales on annual ryegrass straw. Efficiency of recovery of sclerotia using the air-screen machine with known numbers of ergot was 98-100%. Recovery by vacuum collection in the field of a known number of sclerotia distributed over surface residue and plant crowns was 83% +or- 4% in areas without soil cracks, 73% +or- 15% in areas with deep soil cracks, and 79% +or- 13% in areas selected at random. In perennial ryegrass with 23% of heads infected (two sclerotia per infected head), 39 sclerotia per square meter of soil surface were recovered." |
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| Language: | English |
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| References: | 6 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Alderman, S. C., D. B. Churchill, and D. M. Bilsland. 1993. A vacuum collection and seed separation technique for enumeration of sclerotia of Claviceps purpurea in perennial ryegrass fields. Plant Dis. 77(10):p. 1020-1022. |
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| Web URL(s):
http://www.apsnet.org/publications/plantdisease/backissues/Documents/1993Articles/PlantDisease77n10_1020.PDF
Last checked: 08/27/2010
Requires: PDF Reader |
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MSU catalog number: SB 599 .P95 |
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