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| Publication Type:
| Report |
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| Author(s): | Vincelli, P.;
Doney, J. C. |
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| Author Affiliation: | Department of Plant Pathology, University of Kentucky |
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| Title: | Evaluation of fungicides for control of dollar spot of creeping bentgrass, 1996 |
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| Source: | Fungicide and Nematicide Tests. Vol. 52, 1997, p. 377-378. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Abstract/Contents: | "The test was initiated on an established sward at the U.K. Agric. Res. Farm near Lexington. The turf was mowed at 0.25 in., irrigated as needed; and fertilized with urea at 1.5 lb N/1000 sq ft² in Oct & Dec 95. Plots measured 4 x 4 ft with 2-ft borders and were arranged in a randomized complete block design with three replications. All treatments were mixed immediately before spraying, and sprays were applied using a CO²-powered hand-held sprayer fitted with Spray Systems 8003E flant fan nozzles delivering 2.5 gal/1000 sq ft² between 0600-0900h. Control plots were treated with water, then Biotrek sprays were applied, followed by the fungicidal treatments (with appropriate rinses between treatments). Granular materials were applied by hand using a polypropylene bottle with holes drilled through the top. Dollar spot infection centers dime-size or larger were counted. These data were log-transformed prior to analysis to meet the ANOVA assumption of homogeneity of variance. Unusually wet weather prevailed through May and the first half of June, which was followed by several weeks of hot, humid weather with little rainfall. Cold fronts pushed through the region several times during July and August, which were generally cooler than normal. In particular, 90⁰ F was reached on only one day in July. Dollar spot developed from natural inoculum, and high disease pressure developed during the test. Treatments varied greatly in the level of disease control achieved; May treatments provided excellent control. Abundant Sclerotinia mycelial activity was noted on 1 Aug, whereas mycelial activity normally declines by mid-July on 14 Aug, a green alga was observed on necrotic foliage in plots treated with IB-11924. Visually, leaf wetness accumulation was reduced in plots treated with R-11 spreader-sticker, which our previous studies suggest may account for some of the dollar spot control observed in those treatments. No phytotoxicity nor other unusual effects were observed in the test." |
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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):
Vincelli, P., and J. C. Doney. 1997. Evaluation of fungicides for control of dollar spot of creeping bentgrass, 1996. Fungicide Nematicide Tests. 52:p. 377-378. |
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