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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=228
Last checked: 08/12/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Cox, M.;
Smith, A.;
Askew, S. D.;
Corbett, J. |
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| Author Affiliation: | Cox, Smith and Askew: Virginia Tech, Blacksburg, VA; Corbett: Qualipro, Clayton, NC |
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| Title: | Preemergent herbicide combinations for goosegrass control in bermudagrass fairwaysâ |
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| Section: | Graduate student oral paper contest
Other records with the "Graduate student oral paper contest" Section
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| Meeting Info.: | Houston, Texas: January 28-30, 2013 |
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| Source: | Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 141. |
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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: Cynodon; Golf fairways; Goosegrass control; Herbicide combinations; Herbicide efficacy; Herbicide evaluation; Herbicide program; MSMA; Oxadiazon; Preemergence herbicides
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| Geographic Terms: | Virginia |
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| Abstract/Contents: | "With the removal of monosodium methanearsenate (MSMA) from the turfgrass market and very few effective postemergence herbicides available, control options for goosegrass are limited in athletic fields and golf course fairways; therefore, preemergence herbicide programs are key components for inhibiting goosegrass outbreaks in turf. Oxadiazon (Ronstar®) is a preemergence herbicide commonly used to control goosegrass in golf course fairways due to its safety on sprigged bermudagrass. Other preemergence herbicides such as prodiamine, dithiopyr, and oryzalin have also shown activity on goosegrass. The objective of this study was to determine the most effective preemergence herbicide program for goosegrass control in bermudagrass due to lack of control with oxadiazon in the southeastern region of Virginia. A study was conducted as a randomized complete block design at Independence Club in Richmond, VA during the summer of 2012. Three replications were implemented each on a separate fairway within the golf course. All treatments were applied at 407 L ha-1 using Teejet turbo twin injection 11004 nozzles at 262 kPa on March 15, 2012 initially and again on May 30, 2012. Treatments included the following herbicides marketed by Quali-Pro: one application of oxadiazon applied at 3360 g ai ha-1, prodiamine L at 1120 g ai ha-1, prodiamine 65WG at 1120 g ai ha-1, dithiopyr at 560 g ai ha-1, oryzalin at 2240 g ai ha-1; sequential applications of oxadiazon fb prodiamine L, oxadiazon fb dithiopyr, prodiamine L fb prodiamine L, prodiamine L fb dithiopyr, and oryzalin fb dithiopyr 10 weeks after initial treatment (WAIT). Turfgrass on the fairways at Independence Club was 'Midlawn' bermudagrass. Generally speaking, goosegrass pressure is higher on this course closer to the green, year after year, according to the golf course superintendent. This pressure gradient may have attributed to the high variance of goosegrass occurrence between plots and across treatments. Fairways were sprayed with diclofop in July by golf course personnel; however, all dithiopyr and indaziflam applications had already been made. This accidental, broadcast treatment to the trial site controlled all goosegrass seedlings present in plots and injured most mature plants, but it did not prevent accurate goosegrass cover ratings based on the preemergence herbicide treatments. Goosegrass occurred more often in areas of turf infected with spring dead spot than non-infected areas of the fairways. This is likely due to a lack of competition with actively growing bermudagrass. Goosegrass cover was 6% or less for all treatments 27 WAIT, but no treatments were significantly different from each other or the untreated check. Oxadiazon treatments injured the bermudagrass up to 70% 9 days after initial treatment (DAIT), but injury was not evident 24 DAIT; in fact, a rebound effect was observed in these plots as bermudagrass green cover was significantly greater in these plots than all other treatments 24 DAIT. No other treatments caused significant injury to the bermudagrass at any timing during this study. From this site, data suggest that none of the treatments controlled goosegrass when compared to the untreated check. 'Midlawn' bermudagrass is recognized as a slow growing and minimally-competitive cultivar in the transition zone and could have increased goosegrass survival, leading to poor treatment performance. More research should be conducted to determine if more aggressive bermudagrass cultivars, higher fertility, and more consistent goosegrass pressure across the study site would elucidate clearer distinctions between treatment programs." |
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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):
Cox, M., A. Smith, S. D. Askew, and J. Corbett. 2013. Preemergent herbicide combinations for goosegrass control in bermudagrass fairwaysâ. South. Weed Sci. Soc. Proc. 66:p. 141. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=228
Last checked: 08/12/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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