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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t65.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/T065.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.;
Gregos, J. S.;
Aynardi, B.;
Hudson, D. |
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| Author Affiliation: | Fidanza and Aynardi: Pennsylvania State University, Reading, Pennsylvania; Gregos: GEC Turfgrass Consulting, Pittsburgh, Pennsylvania; Hudson: Bellewood Golf Club, North Coventry, Pennsylvania |
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| Title: | Evaluation of fungicides and water-carrier pH for dollar spot control in creeping bentgrass, 2006 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T065. |
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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; Comparisons; Disease control; Dollar spot; Fungicide efficacy; Fungicide evaluation; Sclerotinia homoeocarpa; pH
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| Cultivar Names: | PennTrio |
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| Abstract/Contents: | "The field experiment was conducted on a creeping bentgrass fairway (Bellewood Golf Club, North Coventry, PA) subjected to normal and routine maintenance at 0.450-in. mowing height with a reel mower and clippings not removed. Soil pH was 6.6 with 2.1% organic matter at this silt loam native soil 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 1000 sq ft from two XR TeeJet 8004 nozzles spaced 18 in. apart. Individual plots measured 5 ft x 5 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 added to lower the pH to the desired acidic levels of pH 4 and 5.5, and 1.0 N NaOH added to raise the pH to the desired alkaline levels of pH 8.5 and 10. 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 to the test plots. 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 2 Jun with no disease symptoms present, and natural infestations of dollar spot were first observed in early Jul. All treatments were last applied on 11 Jul, and therefore data represents plot ratings from 11 Jul through 15 Aug or 35 days after the last treatment. Dollar spot pressure at this test site was considered low. Overall, dollar spot control from Headway (acropetal systemic mode of activity) or Banner MAXX (acropetal systemic mode of activity) was generally not affected from the water-carrier pH. Slight dollar spot activity, however, was observed in Headway-treated plots in alkaline water pH = 10, and Banner MAXX-treated plots in acidic water pH = 5.5. Also, among plots treated with Daconil Ultrex (contact mode of activity), dollar spot activity was noticeably higher in alkaline water pH = 8.5 or pH = 10. Therefore, 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., J. S. Gregos, B. Aynardi, and D. Hudson. 2009. Evaluation of fungicides and water-carrier pH for dollar spot control in creeping bentgrass, 2006. PDMR: Plant Dis. Manage. Rep. 3:p. T065. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t65.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/T065.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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