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| Web URL(s): | https://www.jstor.org/stable/24642273?seq=1#page_scan_tab_contents
Last checked: 03/17/2017
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Alderman, Stephen C.;
Elias, Sabry G.;
Hulting, Andrew G. |
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| Author Affiliation: | Alderman: USDA-ARS National Forage Seed Production Research Center; Elias and Hulting: Oregon State University, Department of Crop and Soil Sciences, Corvallis, OR |
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| Title: | Occurrence and trends of weed seed and ergot in Oregon grown Poa pratensis and Poa trivialis seed lots |
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| Source: | Seed Technology. Vol. 35, No. 2, 2013, p. 237-250. |
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| Publishing Information: | Jefferson City, Montana: Association of Official Seed Analysts and Society of Commercial Seed Technologists |
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| # of Pages: | 14 |
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| Keywords: | TIC Keywords: Claviceps purpurea; Poa pratensis; Poa trivialis; Seed contamination; Seed production; Weed seeds
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| Abstract/Contents: | "Oregon is well known for seed production of the amenity grasses Poa pratensis (Kentucky bluegrass) and P. trivialis (rough bluegrass). However, little is known about weed seed and ergot contamination of certified Oregon Poa spp. seed. This study was conducted to assess the diversity and frequency of occurrence of weed seeds and sclerotia of the fungus Claviceps purpurea (ergot) in certified seed lots of P. pratensis and P. trivialis based on purity analysis at Oregon State University Seed Laboratory during 1986-1995 and 2002-2012. For P. pratensis, 155 different weed seed contaminants were detected, with 113 identified to species, 39 to genus and 3 to family. For P. trivialis, 26 contaminants were identified to species and 14 to genus. Between 2002-2012, the percentage of seed lots per year with no weed contaminants ranged from 48-75% and 43-68% for P. pratensis and P. trivialis, respectively, indicating consistent high quality standards for Oregon certified seed. Between 1985-2012, the number of new contaminants in P. pratensis increased at the rate of three per year. In P. trivialis, only one new contaminant species was detected after 2007. The percentage of P. pratensis or P. trivialis seed lots with ergot ranged from 22-61% and 0-10% respectively, depending on year. This study documented a wide and increasing diversity of weed seed contaminants, especially in P. pratensis, and revealed that although the level of ergot from year to year is variable, ergot remains a persistent problem in P. pratensis seed production fields and as a post-harvest seed contaminant." |
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| Language: | English |
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| References: | 18 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Alderman, S. C., S. G. Elias, and A. G. Hulting. 2013. Occurrence and trends of weed seed and ergot in Oregon grown Poa pratensis and Poa trivialis seed lots. Seed Technology. 35(2):p. 237-250. |
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| Web URL(s):
https://www.jstor.org/stable/24642273?seq=1#page_scan_tab_contents
Last checked: 03/17/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b3628131 |
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