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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=207
Last checked: 08/13/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Henry, G. M.;
Cooper, T.;
Hephner, A. J.;
Beck, L. L.;
Rowland, J. H.;
Breeden, G.;
Brosnan, J. |
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| Author Affiliation: | Henry, Cooper, Hephner and Beck: Texas Tech University, Lubbock, TX; Rowland: Bayer Environmental Science, Austin, TX; Breeden and Brosnan: University of Tennessee, Knoxville, TN |
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| Title: | Postemergence dallisgrass control with fall applications of SP25052 |
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| Section: | Weed management in turf crops
Other records with the "Weed management in turf crops" 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. 135. |
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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: Application timing; Fall fertilization; Herbicide efficacy; Herbicide evaluation; Paspalum dilatatum; Postemergence weed control
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| Trade Names: | SP25052 |
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| Abstract/Contents: | "Field trials were conducted at Meadowbrook Golf Course in Lubbock, TX and Pecan Valley Golf Course in Fort Worth, TX during the fall of 2010 to evaluate the efficacy of SP25052 for the control of dallisgrass. Studies were conducted on mature dallisgrass infestations present in hybrid bermudagrass roughs 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 September 27, 2010 or October 21, 2010 and consisted of single or sequential applications of SP25052 (93 or 137 g ai ha-1) + MSO (0.5% v/v) + AMS (2% w/v). Sequential applications of foramsulfuron (106 g ai ha-1), foramsulfuron (106 g ai ha-1) + [dicamba + iodosulfuron + thiencarbazone (174 g ai ha-1)], and an untreated control were added for comparison. Visual estimates of percent dallisgrass cover and bermudagrass phytotoxicity were recorded every two weeks until early December. Dallisgrass regrowth (% cover) the following spring was recorded every two weeks until mid June. Percent dallisgrass cover was converted to percent dallisgrass control by comparing each plot to the cover recorded at initial herbicide application. Data were subjected to analysis of variance (ANOVA) and means were separated using Fisher's Protected LSD at the 0.05 significance level. Significant treatment-by-location interactions were detected for dallisgrass control data; thus, data from each location were analyzed and are presented separately. Single applications of SP25052 applied in October exhibited 37 to 66% dallisgrass control 37 weeks after initial treatment (WAIT), regardless of rate and location, while single applications of SP25052 applied in September exhibited 84 to 94% dallisgrass control 37 WAIT, regardless of rate and location. Sequential treatments of SP25052 in Lubbock, TX exhibited similar control (94 to 95%) to single applications of SP25052 at the high rate applied in September. However, sequential treatments of SP25052 in Fort Worth, TX only exhibited 54 to 70% dallisgrass control 37 WAIT. Sequential applications of foramsulfuron alone exhibited unacceptable dallisgrass control (57 to 58%) 37 WAIT, regardless of location. Foramsulfuron + dicamba + iodosulfuron + thiencarbazone exhibited 94% dallisgrass control in Lubbock, TX, but only 78% in Fort Worth, TX 37 WAIT. Results from this trial suggest that timing is critical when making applications of SP25052 for dallisgrass control in the fall. September applications provide excellent control of dallisgrass while waiting until October to make applications may result in poor control. The tank-mixing of foramsulfuron with dicamba + iodosulfuron + thiencarbazone also provides excellent dallisgrass control when initial applications are made in September." |
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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. 71089, R=213352. R=213352 |
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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):
Henry, G. M., T. Cooper, A. J. Hephner, L. L. Beck, J. H. Rowland, G. Breeden, et al. 2012. Postemergence dallisgrass control with fall applications of SP25052. South. Weed Sci. Soc. Proc. 65:p. 135. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=207
Last checked: 08/13/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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