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| Publication Type:
| Report |
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| Author(s): | Schumann, Gail |
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| Author Affiliation: | Department of Plant Pathology, University of Massachusetts |
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| Title: | Evaluation of selected fungicides for the control of dollar spot in bentgrass, 1989 |
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| Source: | Fungicide and Nematicide Tests. Vol. 45, 1990, p. 261. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Dollar spot; Lanzia; Propiconazole; Moellerodiscus; Triadimefon; Fenarimol; Fungicide evaluation
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| Abstract/Contents: | "Fungicides were evaluated for the control of dollar spot at the University of Massachusetts Turf Research Facility in Deerfield, MA. The bentgrass cultivar 'Penncross' was established in 1979 on silt loam soil and maintained at 0.25 in. mowing height. Nitrogen was applied as liquid urea on 5 May and 12 May (0.5 lb actual N/1000 sq ft. per application) and 16 June and 13 Jult (0.25 lb acutual N/1000 sq ft. per application). No herbicides or insecticides were used. Plots were 3 ft x 4 ft and treatments were arranged in a randomized complete block design with four replications. The turf was irrigated as needed to avoid moisture stress. All fungicides were applied with a CO2 backpack sprayer at approximately 15 psi and a rate equivalent to 2 gal of water per 1000 sq ft. Fungicide applications were initiated when symptoms first appeared. In experiment A, spray intervals were approximately 21 days with applications made on 5 Jun, 26 Jun, 17 July, and 7 Aug. In Experiment B, spray intervals were approximately 28 days with applications made on 5 Jun, 4 Jul, 1 Aug, and 29 Aug. Treatments were evaluated visually for number of infection centers per plot on a weekly basis from 7 Jun to 1 Aug. Natural infection was first observed 5 June. Infection was relatively uniform in all plots, and disease development became severe in early Jul. At the 21 day schedule (Experiment A), all treatments gave acceptable control except Rubigan. At the 28 day schedule (Experiment B), unacceptable disease control was observed for nearly all treatments at the end of the first spray interval. Bayleton 25DF gave the best control at the longer spray interval. the increased fungicide rates used in experiment B were not sufficient to extend control in the longer spray interval. No phytotoxicity was observed." |
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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):
Schumann, G. 1990. Evaluation of selected fungicides for the control of dollar spot in bentgrass, 1989. Fungicide Nematicide Tests. 45:p. 261. |
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