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| Publication Type:
| Report |
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| Author(s): | Butler, M. D. |
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| Author Affiliation: | Oregon State University, Central Oregon Agricultural Research Center, Madras, OR 97741 |
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| Title: | Evaluation of fungicides for powdery mildew control in Kentucky bluegrass, 1994 |
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| Section: | Turf Grass Reports
Other records with the "Turf Grass Reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 50, 1995, p. 361. |
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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; Powdery mildew; Fungicide evaluation; Disease control
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| Abstract/Contents: | "Fungicides were evaluated for powdery mildew control in bluegrass seed fields ('Rugby') near Madras and ('Gnome') Culver, Oregon. Fungicides were applied with 8002 TwinJet nozzles on a 9 ft CO² pressurized boom sprayer at 40 psi and 20 gals of water/A to 10 ft x 20 ft plots replicated three ('Rugby') of four ('Gnome') times in a randomized complete block design. Treatments were initiated on 2 May and were completed on 11 Jun. with biweekly application of Orthorix (calcium polysulfide) and three weeks between application of Bayleton, Tilt and Folicur. Silwet-77 surfactant was applied at 8 oz/100 gals and R-56 at 1 pt/100 gals in combination with non-Orthorix treatments. There were a maximum of 4 Orthorix applications, three applications of other fungicides, and various combinations thereof. Fields were evaluated for severity of disease by rating 20 observations per plot on a scale from 0 (none) to 5 (throughout) on 7 and 8 May. Tests were conducted in commercial fields where standard cultural practices for seed production were followed, except exclusion of fungicides from research areas. Soils are sandy loam with a pH of 6.9. Tilt, Bayleton, and the combination of the two provided significant protection from powdery mildew compared to the non-treated control plots. Folicur and Orthorix treatments provided significant control on the 'Gnome' field, but not on the 'Rugby' field where incidence of the disease was higher. Orthorix alone did not significantly reduce powdery mildew." |
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| Language: | English |
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| References: | 0 |
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| Note: | Report #351
Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Butler, M. D. 1995. Evaluation of fungicides for powdery mildew control in Kentucky bluegrass, 1994. Fungicide Nematicide Tests. 50:p. 361. |
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