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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=298
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Cooper, T.;
Beck, L. L.;
Straw, C.;
Henry, G. M.;
Askew, S. |
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| Author Affiliation: | Cooper, Beck, Straw and Henry: Texas Tech University, Lubbock, TX; Askew: Virginia Tech, Blacksburg, VA |
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| Title: | Response of creeping bentgrass cultivars to metamifop |
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| Section: | Graduate student contest
Other records with the "Graduate student contest" Section
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| Meeting Info.: | Charleston, South Carolina: January 23-25, 2012 |
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| Source: | 2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 226. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis canina; Agrostis stolonifera; Comparisons; Cultivar evaluation; Cultivar variation; Herbicide evaluation; Metamifop
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| Cultivar Names: | Crystal Bluelinks; Penncross; Seaside II; Penn A-4; T-1; L-93; SR7200 |
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| Abstract/Contents: | "Experiments were conducted at the Plant and Soil Science greenhouse facility in Lubbock, TX. 'Crystal Bluelinks', 'Penncross', 'Seaside II', 'Penn A-4', 'T-1', and 'L-93' creeping bentgrass; and 'SR7200' velvet bentgrass were seeded at 147 kg ha-1 into 10.2 cm square pots containing a soilless potting media on August 26, 2011. Pots were allowed to mature in the greenhouse over a three month period. Prior to herbicide application bentgrass was mowed to 0.6 cm with hand-held grass shearers. Treatments were arranged in a randomized complete block design with five replications. Herbicides were applied with a CO2 backpack sprayer equipped with XR8003VS nozzles calibrated to deliver 375 L ha-1 at 221 kPa. Herbicide treatments were applied on December 1, 2011 and consisted of metamifop at 200, 300, 400, and 500 g ai ha-1. A sequential application of each treatment was made on December 22, 2011. An untreated check was included for comparison. Visual ratings of percent bentgrass phytotoxicity was recorded weekly on a scale of 0 (no phytotoxicity) to 100% (completely dead bentgrass). Pots were cut to 0.6 cm after three weeks of growth (prior to sequential treatments), biomass was dried, and weighed. This procedure was conducted again three weeks after sequential treatments. Data were subjected to analysis of variance (ANOVA) (P = 0.05) with sums of squares partitioned to reflect a split plot treatment structure. Bentgrass cultivar was considered the main plot and metamifop rate was considered the subplot. Where main plot effects were significant, regressions were used to explain the relationship of measured responses to metamifop treatments. Effect of metamifop treatments were separated using Fisher's Protected LSD test at P = 0.05. Metamifop at 200 to 300 g ai ha-1 exhibited 0 to 7% bentgrass phytotoxicity 3 WAIT, regardless of cultivar. Metamifop at 400 to 500 g ai ha-1 exhibited 11 to 21% phytotoxicity on 'L-93' and 'Penn A-4', while phytotoxicity on all other cultivars was <= 9% 3 WAIT. The phytotoxicity observed on 'L-93' and 'Penn A-4' in response to metamifop at 400 to 500 g ai ha-1 coincided with large reductions in biomass (71 to 84%) compared to the untreated checks 3 WAIT. All bentgrass cultivars exhibited <= 11% phytotoxicity in response to metamifop at 200 g ai ha-1 6 WAIT. Bentgrass cultivars responded differently to applications of metamifop at 300 g ai ha-1 6 WAIT. Phytotoxicity was only 10% for 'Crystal Bluelinks', 19% for 'Seaside II', 20% for 'SR7200', and 29% for 'T-1'. Phytotoxicity was 44 to 78% for the remaining cultivars 6 WAIT. 'Seaside II', 'SR7200', 'T-1', and 'Crystal Bluelinks' exhibited 22 to 35% phytotoxicity in response to metamifop at 400 g ai ha-1 6 WAIT, while all other cultivars exhibited 68 to 88% phytotoxicity. 'Seaside II', 'SR7200', and 'Crystal Bluelinks' exhibited 48 to 50% phytotoxicity in response to metamifop at 500 g ai ha-1 6 WAIT, while all other cultivars exhibited 66 to 86% phytotoxicity. High levels of phytotoxicity 6 WAIT coincided with large amounts of biomass reduction when compared to the untreated checks." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Updated version appears in ASA, CSSA and SSSA Annual Meetings [2012], 2012, p. 71074, R=213141. R=213141 |
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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):
Cooper, T., L. L. Beck, C. Straw, G. M. Henry, and S. Askew. 2012. Response of creeping bentgrass cultivars to metamifop. South. Weed Sci. Soc. Proc. 65:p. 226. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=298
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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