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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2005.pdf#page=121
Last checked: 07/22/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Watschke, T. L.;
Borger, J. A. |
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| Author Affiliation: | Penn State University, University Park, PA |
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| Title: | Seedhead suppression on putting greens. |
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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.: | Capital Hilton, Washington, D.C.: January 3-6, 2005 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 59, 2005, p. 107. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Seedhead inhibition; Golf greens; Agrostis stolonifera; Poa annua; Growth regulators; Weed control; Color; Phytotoxicity; Turfgrass quality; Herbicide combinations; Herbicide evaluation
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| Abstract/Contents: | This study was conducted on a mixed stand of creeping bentgrass (Agrostis stolonifera) and annual bluegrass (Poa annua) at the Penn State Blue Golf Course in State College, Pa. The objective of the study was to evaluate selected growth regulators, with and without adjuvants, for the seedhead suppression of annual bluegrass. Treatments were applied on April 20 and May 11, 2004 using a three-foot CO2 powered boom sprayer calibrated to deliver 40 gpa using two 11004 flat fan nozzles at 40 psi. The first mowing of the green was conducted on March 24, 2004 and the second mowing on April 7, 2004. On April 7, 2004 the turf was at about 75% green-up. On April 20, 2004 the forsythia was in full bloom. On April 21, 2004 annual bluegrass was at the boot stage of development. On April 28, 2004 forsythia was at the petal drop stage. The turf was maintained using cultural practices for irrigation, mowing, and fertilization that would be typical for a putting green. Color was rated on April 27 and May 3. On the April 27 rating date, only turf treated with Velocity, Banner MAXX, Embark T&O plus 8 oz of MacroSorb Foliar, and Banner MAXX plus Primo MAXX had unacceptable color. By the May 3 rating date, Embark T&O alone, Embark T&O with MacroSorb Foliar (except when Ferromec was added), Embark T&O with GBJ2, Embark T&O with CoRon, Banner MAXX, and Banner MAXX plus Primo MAXX had unacceptable color. The unacceptable color rating found for turf treated with Velocity (April 27) improved to an acceptable level by May 3. Seedhead suppression rated on May 12 revealed that treatments that contained Embark T&O provided the best efficacy. However, only the combination of Embark T&O, Ferromec, and MacroSorb Foliar had acceptable phytotoxicity and quality. Treatments containing Proxy/Primo MAXX and various additives provided suppression from 65 to 80%. While this level of suppression was not as high as that provided by Embark T&O, phytoxicity was lower which resulted in generally higher quality ratings. Some seedhead suppression was observed as a result of Banner MAXX and the combination of Banner MAXX and Primo MAXX, however, severe phytotoxicity was caused which resulted in unacceptable turf quality. By the May 18 rating date, seedhead suppression levels of turf treated with applications containing the Proxy/Primo MAXX combinations were generally less than 60%. The two exceptions were when the Proxy/Primo combination was supplemented with either MacroSorb Foliar (65%) or CoRon (68%). Embark T&O, with and without additives maintained relatively high (generally above 85%) seedhead suppression whie the turf had acceptable levels of phytotoxicity and quality. The untreated turf had unacceptable quality on both rating dates because of the presence of seedheads. Again, turf treated with Banner MAXX and combinations of Banner MAXX and Primo MAXX had minimal seedhead suppression, and that combined with phytotoxicity resulted in turf with unacceptable quality. It did not appear that sequential application (3 WAT) provided significant improvement in suppression of seedheads." |
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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):
Watschke, T. L., and J. A. Borger. 2005. Seedhead suppression on putting greens.. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 59:p. 107. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2005.pdf#page=121
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 57 |
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