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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2008.pdf#page=50
Last checked: 07/15/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Putman, A. I.;
Kaminski, J. E. |
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| Author Affiliation: | University of Connecticut, Storrs |
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| Title: | Influence of bispyribac-sodium on brown patch severity |
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| Section: | Graduate student contest
Other records with the "Graduate student contest" Section
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| Meeting Info.: | Philadelphia, Pennsylvania: January 7-10, 2008 |
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| Source: | Proceedings of the Sixty-Second Annual Meeting of the Northeastern Weed Science Society. Vol. 62, 2008, p. 32. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis tenuis; Bispyribac-sodium; Disease control; Disease severity; Poa annua control; Rhizoctonia blight
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| Cultivar Names: | Allister |
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| Abstract/Contents: | "Bispyribac-sodium (BPS) can be used to selectively remove annual bluegrass (Poa annua L) and roughstalk bluegrass (Poa trivialis L.) from creeping bentgrass (Agrostis stolonifera L.). Although unacceptable levels of yellowing often occurs following the application of BPS, tank-mixing BPS with iron + N products have been shown to reduce or mask this discoloration. In addition to the ability to selectively control undesirable weed species, BPS has also been shown to reduce the incidence of dollar spot caused by Sclerotinia homoeocarpa F.T. Bennett. Limited information, however, is available regarding the positive or negative effects of BPS on other common turfgrass diseases. The objective of this study was to assess the influence of BPS and BPS tank-mixed with an iron + N product on brown patch (Rhizoctonia solani Kuhns) in colonial bentgrass (Agrostis capillaris L.). This field study was conducted in 2007 at the University of Connecticut Plant Science Research and Education Facility in Storrs, CT. In September 2006, an area was seeded to 'Allister' colonial bentgrass. Turf was mowed 3 times per week to a height of 0.5 inches. Bispyribac-sodium was applied twice at 30 g ai/A or three times at 20 or 30 g ai/A. The aforementioned treatments were applied alone or in combination with Lesco's 12-0-0 Chelated Iron Plus Micronutrients (Fe + N at 6.0 oz/1000 ft2). All treatments were applied at 44 gpa using a CO2 pressurized (40 psi) sprayer equipped with a flat-fan nozzle. Treatments were applied on 10 and 24 July and 7 August. Plots measured 3 ft x 6 ft and were arranged in a randomized complete block with 4 replic ations. Brown patch severity was visually rated on a percent scale in which 0 = no brown patch symptoms visible and 100 = entire plot area affected by R. solani. Trace levels of brown patch were observed when treatments were initiated on 10 July. One week after treatment (WAT), br own patch severity was greater in plots receiving only BPS (19 to 25%), when compared to the untreated control (11%). By 24 July (2 WAT), all plots treated with BPS and BPS tank-mixed with Fe + N plots generally had greater levels of brown patch when co mpared to the untreated control. Brown patch severity peaked approximately 2 weeks after the second application of BPS (6 August). On 6 August, all BPS treatments contained between 23 and 34% brown patch and few differences existed among BPS treatm ents. All BPS trea tments, however, had significantly greater levels of brown patch on 6 August when compared to the untreated control (11%). On 21 August, brown patch was greatest in plots receiving 3 applications of BPS or BPS tank-mixed with Fe + N at 30 g ai/A. Treatments in which BPS or BPS tank-mixed with Fe + N was applied twice or applied three times at 20 g ai/A had brown patch levels similar to the untreated control on 21 August. Results from this field study suggest that BPS may increase the severity of brown patch on highly susceptible turfgrass species such as colonial bent grass and additional chemical management strategies may be necessary to adequately suppress disease symptoms." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Putman, A. I., and J. E. Kaminski. 2008. Influence of bispyribac-sodium on brown patch severity. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 62:p. 32. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2008.pdf#page=50
Last checked: 07/15/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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