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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Butler, M. D.;
Crowe, F. J.;
Coats, D. D. |
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| Author Affiliation: | Central Oregon Agricultural Research Center, Oregon State University, Madras, OR 97741 |
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| Title: | Evaluation of fungicides for ergot control in Kentucky bluegrass, 1992 |
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| Source: | Fungicide and Nematicide Tests. Vol. 49, 1994, p. 343. |
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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; Fungicides; Surfactants; Seed weight
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| Cultivar Names: | Chateau |
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| Abstract/Contents: | "The experiment was conducted in a commercial 'Chateau' Kentucky bluegrass seed field near Culver in Jefferson County, Oregon. Punch, Folicur, and Tilt, in combinations with and without Penaturf surfactant, were applied to 10 by 20 ft plots replicated four times in a randomized complete block design. Fungicides were applied with a 9 foot CO2 pressurized boom sprayer at 40 psi and 20 gals/A carrier rate. Silwet-77 surfactant at 16 oz/100 gals was applied in combination with all fungicides except one 7 oz ai Punch treatment. The first treatments were applied 21 May at the initiation of anthesis, with the second application on 2 June. One hundred panicle samples were collected from each plot on 24 June. Samples were analyzed for incidence of sclerotia and visual presence of honeydew. Standard separation procedures were followed and seed weight was determined per sample and for 1,000 seed count. Germination testing was conducted at the Central Oregon Ag Research Center with 100 seed per plot placed on blotter paper in covered germination trays. After 12 days at 5 C trays were placed in a growth chamber with 8 hours of light at 25 C and 16 hours of dark at 15 C. Low levels of ergot were experienced during the 1992 season. There were no statistically significant differences (P<=0.10) between treatment for number of sclerotia, nor the incidence of honeydew. There were statistically significant differences (P<=0.05) between treatments for seed weight. A single application of 7 oz ai/A of Punch withou Silwet-77 provided the greatest weight and the double application of Penaturf had the lowest weight. Although weights per 1000 seed count were not statistically different (P<=0.10), the double application of Penaturf again produced the lightest seed weight, and Penaturf in combination with the three fungicides produced consistently low weights. Fungicided applications alone did not significantly effect seed weight. Germination testing indicated that double applications of Folicur significantly reduce seed germination, while there were no significant differences between the untreated plots and those treated with Tilt, Punch, and Penaturf." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract, with table, only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, M. D., F. J. Crowe, and D. D. Coats. 1994. Evaluation of fungicides for ergot control in Kentucky bluegrass, 1992. Fungicide Nematicide Tests. 49:p. 343. |
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