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| Web URL(s): | http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2004.pdf#page=31
Last checked: 12/10/2013
Requires: PDF Reader
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): | Reed, Janice;
Thill, Donn |
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| Author Affiliation: | University of Idaho, Moscow, Idaho |
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| Title: | Herbicide suppression of Kentucky bluegrass stands in an alternate year seed production system |
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| Section: | Weeds of agronomic crops
Other records with the "Weeds of agronomic crops" Section
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| Meeting Info.: | Colorado Springs, Colorado: March 9-11, 2004 |
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| Source: | Proceedings of the Western Society of Weed Science. Vol. 57, 2004, p. 29. |
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| # of Pages: | 1 |
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| Publishing Information: | Newark, CA: Western Society of Weed Science |
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| Keywords: | TIC Keywords: Weed control; Poa pratensis; Herbicides; Seed production; Application rates
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| Abstract/Contents: | "Sustained bluegrass seed production historically has relied on open-field burning of post-harvest residue. Burning maintains stand longevity by reducing thatch accumulation. However, burning has been associated with significant air quality issues and public health impacts. Mechanical removal of post-harvest residue usually results in greatly reduced Kentucky bluegrass stand life. Bluegrass stand suppression using herbicides in an alternate-year seed production system may sustain productivity and allow in-situ residue decomposition. Experiments were established to determine the optimum time of glyphosate application for stand suppression and sustained seed yield of three Kentucky bluegrass cultivars (Nublue, Newport, and Palouse). Plots were 10 by 30 ft arranged in a randomized complete block design with four replications. Glyphosate was applied to all cultivars at five spring timings in 2001, and the seed yield measured in 2002. Nublue seed yield was highest at the second glyphosate application, while all other timings were equal to or greater than the untreated control. Palouse seed yield was highest at the first application time compared to the two later timings and the untreated control. Newport seed yield was [did] not differ amongst treatments. The experiment was repeated in 2002 and glyphosate injured all three bluegrass cultivars at all application times. Recovery from glyphosate suppression was greatest in Nublue and 2003 seed yield did not differ amongst application timings or the untreated control. Kentucky bluegrass seed yield was lowest for latest timing in Newport and the second timing in Palouse; yield at all other timings did not differ from the untreated control. The effect of six herbicides on stand suppression and rejuvination of two Kentucky bluegrass cultivars (Newport and Quantum Leap) was initiated in 2002. Plots were 8 by 30 feet, arranged in a split block design with four replications. The main plot was herbicide and the sub-plot was herbicide timing. Herbicides were applied in 2002 to both cultivars at three spring timings. Bluegrass suppression and regrowth were visually estimated and seed yield was determined in 2003. Sulfosulfuron did not suppress the stand or affect the yield of either cultivar compared to the untreated control. All plots treated with glyphosate were severely injured and did not produce seed. Newport seed yield from plots treated with quizalofop, paraquat, and glufosinate, at all timings were equal to or greater than the untreated control. Imazapic applied at the two earlier timings reduced yield, but yield at the later timing did not differ from the untreated control. Quantum Leap yield did not differ among herbicides or application timings. The experiment was repeated in 2003 on cultivars Rambo and Cenex 22. The experimental design was the same as the 2002 experiment, but the sulfosulfuron treatment was dropped. All plots treated with glyphosate were severely injured and had no regrowth in 2003. Rambo regrowth in June 2003 did not differ between application timings for paraquat, imazapic, and glufosinate. Plots treated with quizalofop at the earlier timing had more regrowth than the later application timing. Cenex 22 regrowth was greatest at the early timing of paraquat, and the late timing of imazapic and quizalofop. Cenex 22 plots treated with glufosinate at the second timing had the greatest regrowth compared to the early and late timings. Rambo and Cenex 22 seed yield will be determined in 2004." |
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| Language: | English |
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| References: | 0 |
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| Note: | "This article appears as abstract only." |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Reed, J., and D. Thill. 2004. Herbicide suppression of Kentucky bluegrass stands in an alternate year seed production system. Proc. West. Soc. Weed Sci. 57:p. 29. |
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| Web URL(s):
http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2004.pdf#page=31
Last checked: 12/10/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .W43 v.49 |
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