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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=204
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Post, Angela R.;
Jester, Jennifer L.;
Askew, Shawn D.;
Grove, Melvin D. |
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| Author Affiliation: | Virginia Tech, Blacksburg |
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| Title: | Field assessment of flazasulfuron and trifloxysulfuron sodium drift using a corn (Zea mays) bioassay |
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| Section: | Weed management in turf
Other records with the "Weed management in turf" Section
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| Meeting Info.: | San Juan, Puerto Rico: January 24-26, 2011 |
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| Source: | 2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 96. |
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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: Flazasulfuron; Herbicide evaluation; Pesticide usage legislation; Spray drift; Trifloxysulfuron; USEPA; Zea mays
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| Abstract/Contents: | "In 2007 flazasulfuron was granted a conditional registration by the United States Environmental Protection Agency (EPA). This product is a sulfonylurea herbicide labeled for use in bermudagrass and zoysiagrass, but the 2007 registration required a 30 m nontreated buffer between treated turf and sensitive plants. In the US, the most common use for flazasulfuron is control of perennial ryegrass in overseeded bermudagrass on golf course fairways. With a 30 m buffer requirement, this use is essentially prohibited since most fairways are less than 60 m wide and typically bordered by sensitive cool-season turf species. A similar herbicide, trifloxysulfuron sodium, has a required buffer of only 7.6 m which is acceptable for use in the golf industry. Field data were needed to replace EPA models if the buffer restriction was to be modified and the product successfully sold in US markets. Our objective was to assess drift of flazasulfuron and trifloxysulfuron sodium using EPA guidelines for application conditions that match label specifications for each herbicide. Corn is sensitive to both herbicides and was chosen as a suitable bioassay species for these drift studies. Two field studies were conducted at the Glade Road Research Facility in Blacksburg, VA in 2008 and 2009. Corn plants were greenhouse grown in 10 cm pots and thinned to one plant per pot. After two weeks, plant sizes were recorded and the study initiated. Studies were conducted as randomized complete block split plot designs with two herbicide main plots and six distance-from-target subplots. Studies included five replications with four plants as subplots within each replication. The herbicide main plots included flazasulfuron (52 g a.i./ha) and trifloxysulfuron sodium (30 g a.i./ha). Herbicides were applied to 'Riviera' bermudagrass mown at 1.3 cm. A Toro Multipro turf sprayer was operated perpendicular to prevailing wind direction and corn plants were placed downwind along a transect. Herbicides were applied perpendicular to a 6.4 to 9.7 km hr-1 wind and corn plants were placed at distances between 0 and 30.5 m down-wind from the spray application. Wind speed and direction was determined using wind meters and neutrally buoyant balloons. After spraying, plants were returned to the greenhouse and randomized. Concurrently, a bioassay was conducted to determine corn growth response to herbicide rates. Eleven rates of flazasulfuron and trifloxysulfuron sodium were applied to five replicates each containing four subsamples for a total of 20 plants treated with each herbicide rate. Herbicide rates were based on maximum labeled rates and all treatments included nonionic surfactant at 0.25% by volume. Bioassay corn plants were returned to the greenhouse after spraying and randomized with field drift study plants. Height measurements were taken at weekly intervals for three weeks after treatment. The bioassay based on corn height reduction indicated trifloxysulfuron sodium reduced corn height more than flazasulfuron. In the drift study flazasulfuron drift injury was not detected beyond 4.6 m downwind of application. These results were submitted to EPA along with other data and the label was modified to reduce the buffer restriction to 8 m. Flazasulfuron was released by PBI Gordon in 2010 under the trade name Katana Turf Herbicide®." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related article "Field assessment of flazasulfuron and trifloxysulfuron sodium drift" International Turfgrass Society Research Journal 14(1) June 2022, pp. 735-741, R=321450. R=321450 |
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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):
Post, A. R., J. L. Jester, S. D. Askew, and M. D. Grove. 2011. Field assessment of flazasulfuron and trifloxysulfuron sodium drift using a corn (Zea mays) bioassay. South. Weed Sci. Soc. Proc. 64:p. 96. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=204
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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