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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=110
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Kaminski, J. E.;
Dernoeden, P. H. |
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| Author Affiliation: | Kaminski: Graduate Research Assistant, and Dermoeden: Professor, Department of Natural Resource Sciences & LA, Universit of Maryland, College Park, MD |
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| Title: | Growth regulation in bentgrass as influenced by trinexapac-ethyl and a biostimulant |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Boston Marriott Cambridge, Cambridge, MA: January 2, 3, 4, and 5, 2001 |
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| Source: | Proceedings of the 55th Annual Meeting of the NortheasternWeed Science Society. Vol. 55, 2001, p. 110-111. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Growth regulators; Agrostis stolonifera; Trinexapac-ethyl; Biostimulants; Gibberellic acid; Golf courses; Golf greens; Visual evaluation
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| Abstract/Contents: | "Golf course superintendents routinely apply trinexapac-ethyl (TE) to putting greens to suppress clippings and improve green speed. The biostimulant Astron® (Floratine Products Group, Inc., Collierville, TN) is used on greens to improve turf vigor in the summer. Trinexapac-ethyl inhibits growth by suppressing gibberellic acid (GA) synthesis in plants. Astron contains some micronutrients and an unspecified amount and source of GA, which may influence the growth regulation effects of TE. The ojectives of this study were to assess any potential positive or negative TE and Astron interactions. Astron and TE were applied to 'Providence' creeping bentgrass (Agrostis palustris Huds.) grown on a USGA specified green mix and mowed to a height of 0.20 in. Treatments were applied on the dates footnoted in Table 1. All treatments were applied with a CO2 pressurized sprayer (35 psi) calibrated to deliver 50 gpa. Plots were generally mowed one to two days after treatment and then again after clipping weights were obtained. Clipping weights were measured by making two passes through each plot with a walkbehind greensmower equipped with a basket. The collected clippings were dried at 50-60 °C for at least 3 d and reweighed. Turf quality was visually assessed weekly. Plots were 5 x 10 ft and were arranged in a randomized complete block with four replications. Data were subjected to the analysis of variance and significantly different means were separated by LSD t-test P = 0.05. Astron and TE were applied either alone or tank-mized together on a 14-d interval. A fourth treatment involved TE applied weekly and tank-mized with Astron on a 14-d interval. Seven days following the first application (21 June), plots treated with TE alone were suppressed more (47%) than plots treated with TE + Astron (29-31%). Except on 30 June, Astron reduced the effectiveness of TE in the TE + Astron on the 14-d treatment between 21 June and 11 Aug. On 6 July, clipping weights were slightly increased in plots treated with TE + Astron (14-d), and these clipping weights were equivalent to those collected from the untreated control. Plots treated with TE alone or TE + Astron on 14-d interval incurred post inhibition growth simulation by 11 and 25 Aug, respectively. Plots treated with TE weekly + Astron on a 14-d interval exhibited a similar level of growth inhibition when compared to plots treated with TE alone on about half of the rating dates between 21 June and 4 Aug. On 13 and 20 July, however, plots treated with TE weekly + Astron on a 14-d interval exhibited significantly less growth suppression versus plots treated with TE alone and applied on a 14-d interval. Between 21 June and 4 August, the average reduction of clippings as a percent of the control was 43%, 23% and 45% for plots treated with TE alone, TE + Astron on the 14-d interval, and TE weekly + Astron on a 14-d interval, respectively. Hence, there was no dramatic improvement in growth suppression accorded by applying TE weekly and Astron on a 14-d interval, when compared to TE alone on a 14-d interval. Evidently, the GA and possibly the nutrients in Astron reduced the effectiveness of TE applied on a 14-d interval, but (on average) not when TE was applied weekly. Astron alone only improved quality, when compared to untreated plots, on 11 and 18 August. Except during the 11 to 18 July period, however, there was no significant enhancement in quality provided by Astron used in conjunction with TE." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: Biostimulants |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E., and P. H. Dernoeden. 2001. Growth regulation in bentgrass as influenced by trinexapac-ethyl and a biostimulant. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 55:p. 110-111. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=110
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 53 |
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