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| Publication Type:
| Report |
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| Author(s): | Dykema, N. M.;
Vargas, J. M. Jr. |
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| Author Affiliation: | Department of Botany and Plant Pathology, Michigan State University, E. Lansing, MI |
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| Title: | Evaluation of fungicides for the control of brown patch, 1998 |
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| Source: | Fungicide and Nematicide Tests. Vol. 54, 1999, p. 474. |
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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 annua; Agrostis tenuis; Disease control; Brown patch; Rhizoctonia solani; Fungicide evaluation; Application rates; Application timing; Chlorothalonil; Azoxystrobin; Flutolanil; Mecoprop; Tank mix; Disease severity; Phytotoxicity
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| Abstract/Contents: | "This test was conducted at the Hancock Turfgrass Research Center, E. Lansing, MI on a mixed stand of colonial bentgrass and annual bluegrass on loam soil. Plots were mowed at 1.5 in, and fertilized monthly with 1 lb nitrogen per 1000 sq ft beginning on 15 May. Fungicide treatments were initiated on 15 June and were applied to 2 ft x 4.5 ft plots arranged in a randomized complete block design with four replications. Applications were made using a hand held CO₂-powered back pack sprayer at 36 psi with a single 8002E flat fan TeeJet nozzle at a rate of 1.1 gal per 1000 sq ft. The entire plot area was inoculated weekly with R solani growing on a sand/cornmeal mixture from 17 June until 16 July using a drop spreader at a rate of 2.5 lb per 1000 sq ft. Each plot was uncovered with a 1 ft x 2 ft opaque plastic pan in the late afternoon and uncovered each morning for at least 5 days each week. The test area was heavily irrigated beginning in mid June and for the duration of the study. Visual estimations of the % area blighted of the covered portion of each plot were recorded. Data were subjected to analysis of variance and LSD test, p=0.05. Disease pressure was heavy late in the study. On 27 Jul, more than 94% of the covered areas of the control plots were infected with brown patch. Near complete suppression of disease for the duration of the study was provided by Daconil Ultrex, Heritage, Echo, Eminent Star, and Prostar + Daconil 2787. AMV 300 did not provide disease suppression when compared to the untreated control. Heritage lost efficacy when applied at 0.4 oz every 28 days as compared to 0.2 oz every 14 days. The Prostar 70WP provided significantly better control than did the Prostar 50 WP treatment. Phytotoxicity was observed after each of the first 2 applications of AMV 300 but not with subsequent applications. Phytotoxicity was not observed for any other treatments." |
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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):
Dykema, N. M., and J. M. Jr. Vargas. 1999. Evaluation of fungicides for the control of brown patch, 1998. Fungicide Nematicide Tests. 54:p. 474. |
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