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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=79
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): | Straw, C.;
Cooper, T.;
Beck, L. L.;
Henry, G. M. |
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| Author Affiliation: | Texas Tech University, Lubbock, TX |
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| Title: | Efficacy of SP25052 for the control of yellow and purple nutsedge in bermudagrass |
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| Section: | Posters
Other records with the "Posters" 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. 7. |
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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: Comparisons; Cynodon dactylon; Cyperus esculentus; Cyperus rotundus; Herbicide efficacy; Herbicide evaluation; Postemergence weed control
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| Trade Names: | SP25052 |
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| Abstract/Contents: | "Field experiments were conducted at Abilene Country Club in Abilene, TX in the summer of 2011 to quantify the efficacy of SP25052 for the postemergence control of yellow and purple nutsedge. Studies were located on established infestations of yellow and purple nutsedge present in a common bermudagrass rough cut to a height of 3.8 cm. Plots measured 1.5 x 1.5 m and were arranged in a randomized complete block design with four replications. Treatments were applied using a CO2 backpack sprayer equipped with XR8004VS nozzle tips and calibrated to deliver 375 L ha-1 at 221 kPa. Treatments were initiated on June 22, 2011 and consisted of SP25052 at 127 g ai ha-1, SP25052 (127 g ai ha-1) + MSO (0.5% v/v), SP25052 (137 g ai ha-1) + MSO (0.5% v/v) + AMS (2% w/v), SP25052 (127 g ai ha-1) + NIS (0.5% v/v), trifloxysulfuron (27.8 g ai ha-1) + NIS (0.5% v/v), sulfosulfuron (65.7 g ai ha-1) + NIS (0.5% v/v), and dicamba + iodosulfuron + thiencarbazone at 233.4 g ai ha-1 (yellow nutsedge trial only). Sequential applications of all treatments were made on July 20, 2011. Visual estimates of percent yellow and purple nutsedge control and bermudagrass phytotoxicity were recorded 1, 2, 3, 4, 5, 6, 8, and 12 weeks after initial treatment (WAIT). Data were subjected to analysis of variance (ANOVA) and means were separated using Fisher's Protected LSD at the 0.05 significance level. Bermudagrass phytotoxicity was greatest (5 to 6%) 1 week after application (WAA) for SP25052 + MSO + AMS and trifloxysulfuron treatments, regardless of timing or nutsedge trial. Bermudagrass phytotoxicity was no longer visible for all treatments 3 WAA, regardless of timing or nutsedge trial. Yellow nutsedge check plots exhibited approximately 60% cover throughout the duration of the trial. Excellent yellow nutsedge control (<= 5% cover) was exhibited 4 WAIT with trifloxysulfuron, sulfosulfuron, and SP25052 + MSO. All other SP25052 treatments exhibited 6 to 9% yellow nutsedge cover 4 WAIT. Dicamba + iodosulfuron + thiencarbazone exhibited the least amount of yellow nutsedge control (17% cover) 4 WAIT. All treatments except dicamba + iodosulfuron + thiencarbazone (14% cover) exhibited <= 2% yellow nutsedge cover 8 WAIT. Long-term yellow nutsedge control (12 WAIT) was greatest for trifloxysulfuron (2% cover) and sulfosulfuron (0% cover). The greatest long-term yellow nutsedge control (12 WAIT) for SP25052 treatments was exhibited by SP25052 + MSO + AMS (7% cover) followed by SP25052 + MSO (15% cover). Dicamba + iodosulfuron + thiencarbazone exhibited moderate long-term yellow nutsedge control (20% cover) 12 WAIT. SP25052 + MSO + AMS provided equivalent long-term yellow nutsedge control as trifloxysulfuron and sulfosulfuron. However, initial phytotoxicity may exist in response to the addition of AMS. Purple nutsedge check plots exhibited approximately 75% cover throughout the duration of the trial. Purple nutsedge control was greatest 4 WAIT with trifloxysulfuron (0% cover) and sulfosulfuron (2.5% cover). All SP25052 treatments exhibited 9 to 14% purple nutsedge cover 4 WAIT. Purple nutsedge control with trifloxysulfuron and sulfosulfuron was sustained (0% cover) 8 WAIT. All SP25052 treatments exhibited 5 to 11% purple nutsedge cover 8 WAIT. Long-term purple nutsedge control (12 WAIT) was greatest in response to trifloxysulfuron (1% cover) and sulfosulfuron (7% cover). The greatest long-term purple nutsedge control (12 WAIT) for SP25052 treatments was exhibited by SP25052 + MSO + AMS (22% cover). All other SP25052 treatments exhibited > 38% purple nutsedge cover 12 WAIT. No SP25052 treatments exhibited long-term purple nutsedge control similar to trifloxysulfuron or sulfosulfuron." |
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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):
Straw, C., T. Cooper, L. L. Beck, and G. M. Henry. 2012. Efficacy of SP25052 for the control of yellow and purple nutsedge in bermudagrass. South. Weed Sci. Soc. Proc. 65:p. 7. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=79
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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