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Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS.1998.82.1.89 Last checked: 08/27/2010 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Alderman, S. C.;
Coats, D. D.;
Crowe, F. J.;
Butler, M. D. |
Author Affiliation: | Plant Pathologist, USDA-ARS National Forage Seed Production Research Center, Corvalis, OR 97331; Research Assistant, Associate Professor, Department of Botany and Plant Pathology, Oregon State University, Extension Agronomist, Central Oregon Agricultural Research Center, Madras 97741 |
Title: | Occurrence and distribution of ergot and estimates of seed loss in Kentucky bluegrass grown for seed in central Oregon |
Section: | Research Other records with the "Research" Section
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Source: | Plant Disease. Vol. 82, No. 1, January 1998, p. 89-93. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 5 |
Keywords: | TIC Keywords: Seeds; Poa pratensis; Seed crops; Ergot; Disease severity; Seed treatment; Claviceps purpurea; Seed quality
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Abstract/Contents: | "In 1991 to 1993, ergot was detected in 36, 44 and 62%, respectively, of fields of Kentucky bluegrass grown for seed in central Oregon. Relatively few fields (2to 13%) had a high (more than 20 sclerotia/gm seed) level of ergot. Ergot severity (percent sclerotia by weight) in 1991 to 1993 was estimated at 0.85, 0.07 and 0.34%, respectively. Percent seed replaced by ergot in 1991 to 1993 was estimated at 0.22, 0.02, and 0.08, respectively. Recleaning of seed to reduce ergot contamination and to meet purity standards resulted in a 7.8% reduction in marketable seed weight. Estimated value of seed replaced by ergot in 1991, 1992, and 1993, was $75,625, $4,758, and $17,076, respectively. Estimated value of seed lost during recleaning in 1991, 1992, and 1993, was $37,669, $8,171, and $21, 964, respectively. Weed grasses supporting ergot at the time of harvest of Kentucky bluegrass were species of Bromus, Secale, Festuca, and Poa. However, very few seed heads of weed grasses were infected, and they appeared to contribute little to ergot development in central Oregon. Most infested fields (with more than one sclerotium/gm seed prior to recleaning) or weed grass sites with ergot were located in the southern range of the area of study." |
Language: | English |
References: | 22 |
Note: | Figures Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Alderman, S. C., D. D. Coats, F. J. Crowe, and M. D. Butler. 1998. Occurrence and distribution of ergot and estimates of seed loss in Kentucky bluegrass grown for seed in central Oregon. Plant Dis. 82(1):p. 89-93. |
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| Web URL(s): http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS.1998.82.1.89 Last checked: 08/27/2010 Requires: PDF Reader |
| MSU catalog number: SB 599 .P95 |
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