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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t70.asp
Last checked: 07/10/2013
Access conditions: Item is within a limited-access website
Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T070.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Author(s): | Fidanza, M. A.;
Clarke, B. B.;
Majumdar, P. |
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| Author Affiliation: | Fidanza: Pennsylvania State University, Reading, Pennsylvania; Clarke and Majumdar: Rutgers, The State University of New Jersey, New Brunswick, New Jersey |
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| Title: | Evaluation of fungicides and water-carrier pH for dollar spot control in creeping bentgrass, 2007 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T070. |
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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: Agrostis stolonifera; Dollar spot; Fungicide evaluation; Sclerotinia homoeocarpa; Symptoms; pH
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| Cultivar Names: | Penncross |
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| Abstract/Contents: | "The field experiment was conducted on creeping bentgrass (Hort Farm II, Rutgers University, New Brunswick, NJ) maintained at a 0.156-in. mowing height with a reel mower and clippings removed. Soil pH was 6.5 with 1.8% organic matter at this sand-based soil test site. All treatments were applied with a CO2-powered backpack sprayer pressured to 40 psi and calibrated to deliver 1.0 gal water-carrier per 1,000 sq ft from one XR TeeJet 8004 nozzle. Individual plots measured 2 ft x 7 ft, and treatments were arranged as a randomized complete block design with three replications. Product treatments, application rates, water-carrier pH, and application calendar dates are listed in the table. Water-carrier pH was adjusted from deionized water (pH = 7), with 1.0 N HCl used to lower the pH to the desired acidic level of pH 5 and 1.0 N NaOH used to raise the pH to the desired alkaline level of pH 9. After the pH was adjusted, the fungicide treatments were added to the water (i.e., one liter bottle size) and allowed to sit for one hour prior to application. Dollar spot was visually evaluated by counting the number of active S. Homoeocarpa infection centers per plot, and data were subjected to analysis of variance with treatment means compared by Fisher's protected least significance difference test at P = 0.05. The experiment was initiated on 20 Jun with no disease symptoms present, and natural infestations of dollar spot were first observed in mid- Jul. All treatments were last applied on 3 Jul, and therefore data represents plot ratings over two weeks later on 19 Jul. Dollar spot pressure at this test site was considered moderate to severe. All treatments, except Clearys 3336, provided a statistically similar level of dollar spot control across all three water-carrier pH levels. Dollar spot control was reduced in plots treated with Clearys 3336 (thiophanate-methyl) when applied in the alkaline water-carrier pH of 9 (note: the MSDS information for Clearys 3336 50WP indicates a pH range of 6.5 to 8.0), compared to that same treatment applied in a water-carrier pH of 5 or 7. The monitoring and measuring of water-carrier pH may be a useful tool to prevent the decomposition of fungicides and other plant protection chemicals by alkaline hydrolysis in the spray tank." |
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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):
Fidanza, M. A., B. B. Clarke, and P. Majumdar. 2009. Evaluation of fungicides and water-carrier pH for dollar spot control in creeping bentgrass, 2007. PDMR: Plant Dis. Manage. Rep. 3:p. T070. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t70.asp
Last checked: 07/10/2013
Access conditions: Item is within a limited-access website
Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T070.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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