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| Publication Type:
| Report |
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| Author(s): | Butler, M. D.;
Crowe, F. J.;
Alderman, S. C. |
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| Author Affiliation: | Butler and Crowe: Oregon State University, Central Oregon Agricultural Research Center, Madras, OR; and Alderman: USDA-ARS (NFSPRC), Corvallis, OR |
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| Title: | Evaluation of fungicides for control of ergot in Kentucky bluegrass, 1997 |
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| Source: | Fungicide and Nematicide Tests. Vol. 54, 1999, p. 509. |
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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: Poa pratensis; Ergot; Claviceps purpurea; Disease control; Fungicide evaluation; Application rates; Disease severity; Seed weight; Seed germination
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| Cultivar Names: | Coventry |
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| Abstract/Contents: | "Fungicides were evaluated for control of ergot in field plots of Kentucky bluegrass ('Coventry') at the Central Oregon Agricultural Research Center (Powell Butte site). Standard cultural practices for grass seed production were followed with the exception of fungicide applications. Soils were sandy loam with a pH of 6.9. Plots were infested with ergot at 1 sclerotium/ft² on 20 Dec 1996. Fungicides, Tilt, Folicur, Quadris and Orthorix were applied to 10 ft x 20 ft plots replicated four times in a randomized complete block design. Fungicides were applied with 8003 TwinJet nozzles on a 9 ft CO₂ pressurized, hand-held, boom sprayer at 40 psi and 30 gals of water/A. Surfactants, Sylgard 309 at 16 fl oz/100 gal and R-56 at 1 pt/100 gal were applied in combination with all fungicides except when Penaturf or Sylgard 309 were applied alone. Crop oil concentrate (COC) was applied at 1% v/v with all Quadris applications and one of the double applications of Tilt. Penaturf and Sylgard 309 were applied individually as the second of two treatments following Tilt. Treatments were applied 30 May and 9 Jun, with the first treatments applied at the initiation of anthesis. One hundred panicles were collected from each plot on 11 Jul. Number of panicles with sclerotia and sclerotia per sample were determined for each plot. Samples were cleaned and weight per 1,000 seed count was determined. Percent seed germination was conducted using AOSA rules for testing seeds. All fungicide treatments significantly reduced sclerotia per sample compared to the untreated plots. There was also significantly greater control with double applications of Tilt at 8 fl oz/A with and without COC, and Tilt at 8 fl oz/A followed by Orthorix at 64 fl oz/A compared to a single application of Quadris at 12 fl oz/A." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, M. D., F. J. Crowe, and S. C. Alderman. 1999. Evaluation of fungicides for control of ergot in Kentucky bluegrass, 1997. Fungicide Nematicide Tests. 54:p. 509. |
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MSU catalog number: SB 951.3 .F82 |
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