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| Web URL(s): | https://a-c-s.confex.com/crops/2011am/webprogram/Paper64563.html
Last checked: 02/21/2017
Notes: Abstract only |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Baldwin, Christian;
Schnore, Jonathan;
Brede, A. Douglas;
Mayer, Jami |
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| Author Affiliation: | J. R. Simplot Company, Post Falls, ID |
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| Title: | Glyphosate application rates for Poa annua control in glyphosate tolerant perennial ryegrass cultivars, 'JS501' and 'replay' |
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| Section: | Weed control & diseases in turfgrass
Other records with the "Weed control & diseases in turfgrass" Section
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| Meeting Info.: | San Antonio, TX: October 16-19, 2011 |
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| Source: | 2011 International Annual Meetings: [Abstracts][ASA-CSSA-SSSA]. 2011, p. 64563. |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application rates; Chemical safety; Color; Glyphosate; Herbicide evaluation; Herbicide resistance; Leaf firing; Lolium perenne; Poa annua control; Recommendations
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| Cultivar Names: | Replay; JS501 |
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| Abstract/Contents: | "The use of glyphosate tolerant perennial ryegrass (Lolium perenne L.) cultivars, JS501 and Replay, could provide turfgrass managers with a new option for Poa annua control. The objectives of these trials were to determine 1) glyphosate application safety rates and 2) glyphosate rates for effective Poa annua control. In the safety rate trial, Replay perennial ryegrass was seeded on 5 May 2010 in Post Falls, ID at 390 kg ha-1. Glyphosate (Departure brand, Syngenta) was applied on 15 Sep. 2010 at 0, 0.29, 0.58, 1.16, 1.74, 2.32, and 3.48 kg ae ha-1. In the Poa annua control trial, one block of JS501 and one block of Replay were seeded on 15 Sep. 2008 at 390 kg ha-1. Glyphosate rates were randomized within each block at rates of 0, 0.15, 0.29, 0.44 and 0.58 kg ae ha-1. Glyphosate was applied on 17 June and 19 Aug. 2009 and 25 June and 25 Aug. 2010. Data collected for both trials included turfgrass color, percent leaf firing, and percent Poa annua. In the safety rate trial, an application of 0.85 kg ae ha-1 (air temperature at application was 26°C) was required to cause 20% leaf firing. In the Poa annua control trial, after four glyphosate applications over a 2-year period, plots treated at 0.29 kg ha-1 or greater resulted in less than 10% Poa annua. Meanwhile, plots that were untreated or sprayed at 0.15 kg ae ha-1 had 83% and 28% Poa annua, respectively. Based on the environmental conditions of each trial, results suggest a recommended application rate should be 0.29 kg ae ha-1. This rate is sufficient for Poa annua control and also provides protection in case a spray overlap occurs during an application." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Updated version appears in 2012 Proceedings, Southern Weed Science Society, Vol. 65 2012, p. 145, with variant authors C. M. Baldwin and A. D. Brede, R=227083. R=227083 |
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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):
Baldwin, C., J. Schnore, A. D. Brede, and J. Mayer. 2011. Glyphosate application rates for Poa annua control in glyphosate tolerant perennial ryegrass cultivars, 'JS501' and 'replay'. Int. Ann. Meet. p. 64563. |
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https://a-c-s.confex.com/crops/2011am/webprogram/Paper64563.html
Last checked: 02/21/2017
Notes: Abstract only |
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