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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T017.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Kaminski, J. E.;
Putman, A. I. |
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| Author Affiliation: | Department of Plant Science, University of Connecticut, Storrs, Connecticut |
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| Title: | Preventive control of dollar spot with Cleary and Syngenta fungicides and Primo MAXX, 2006 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 1, 2007, p. T017. |
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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: Preventive control; Dollar spot; Fungicides; Fungicide trials; Disease severity; Poa pratensis
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| Abstract/Contents: | "This study was initiated at the University of Connecticut Plant Science Research and Education Facility located in Storrs, CT. Soil was a loam with a pH of 5.9 and 5.8% OM. Turfgrass used for the fungicide evaluation was a two year old stand of 'Crenshaw' creeping bentgrass (Agrostis stolonifera). The area was maintained as a bentgrass fairway. The turf was mowed four times per week to a height of 0.5-in and irrigated as necessary to prevent wilt. All treatments were applied with a COO2-pressurized (35 psi) sprayer equipped with a flat-fan nozzle, and calibrated to deliver 2.5 gal water per 1000 ft2. All treatments were applied on the dates indicated in the data tables. On 30 June, the area was inoculated using sterile Kentucky bluegrass (Poa pratensis) seeds infested with a single isolate of S. Homoeocarpa. Plots measured 5 ft x 5 ft, and were arranged in a randomized complete block with four replications. Percent plot area affected by Sclerotinia homoeocarpa was visually rated on a 0 to 100 scale where 0 = entire plot void of dollar spot and 100 = entire plot area covered with dollar spot symptoms. Dollar spot symptoms first were observed within plots approximately 5 days after inoculation (5 Jul). On 14 Jul, all treatments applied on a 14-day interval were free of dollar spot symptoms. Treatments applied on a 21-day interval had unacceptable levels (ā„ 1%) of dollar spot on the scheduled date of reapplication (14 Jul). On most rating dates, plots treated with 3336 Plus, 3336F, 3336F + CL-EXP-13, 3336F + CL-EXP-14, Daconil Ultrex (3.2 oz), Daconil + Banner MAXX, Banner MAXX, and Headway provided acceptable dollar spot control. Moderate to poor control was exhibited on a majority of the rating dates within plots treated on a 21-day interval with A7402 (0.16 oz and 0.31 oz) or Headway + Primo MAXX. Disease severity within plots treated with A7402 was negatively correlated with fungicide rate, with the greatest disease suppression afforded by the highest application rate. Although unacceptable for a golf course fairway, plots treated with Primo MAXX alone exhibited less dollar spot when compared to the untreated control on 4 out of 7 rating dates. Several treatments continued to provide an acceptable level of dollar spot control for up to 3 wk following the last application. However, on 1 Sep (4 wks after last application), no treatments were providing acceptable control. On 1 Sep, plots with the least amount of dollar spot (2 to 6% disease) included those treated with 3336 Plus, 3336F, 3336F + CL-EXP-13, 3336F + CL-EXP-14, Daconil Ultrex (3.2 oz), Daconil + Banner MAXX, and Banner MAXX. On the final rating date (1 Sep), 95% of the untreated control plots were damaged by S. Homoeocarpa." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E., and A. I. Putman. 2007. Preventive control of dollar spot with Cleary and Syngenta fungicides and Primo MAXX, 2006. PDMR: Plant Dis. Manage. Rep. 1:p. T017. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T017.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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