Full TGIF Record # 227005
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=115
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Author(s):Cooper, T.; Straw, C.; Beck, L. L.; Henry, G. M.
Author Affiliation:Texas Tech University, Lubbock, TX
Title:Efficacy of metamifop for the postemergence control of bermudagrass
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Meeting Info.:Charleston, South Carolina: January 23-25, 2012
Source:2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 43.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Comparisons; Cynodon dactylon; Herbicide evaluation; Metamifop; Postemergence weed control
Cultivar Names:Riviera; Savannah
Abstract/Contents:"Experiments were conducted at the Plant and Soil Science greenhouse facility in Lubbock, TX. 'Riviera' hybrid bermudagrass and 'Savannah' common bermudagrass were seeded at 244 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 bermudagrass 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 XR8004VS 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 bermudagrass control was recorded weekly on a scale of 0 (no control) to 100% (completely dead bermudagrass). 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. Bermudagrass 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. The non-treated check pots exhibited 0% control and 0.56 to 0.8 g of biomass 3 WAIT, regardless of cultivar. Metamifop at 300 to 500 g ai ha-1 exhibited 96 to 100% bermudagrass control 3 WAIT, regardless of cultivar. Bermudagrass subjected to those same treatments only exhibited 0.01 to 0.03 g of biomass 3 WAIT, regardless of cultivar. The 200 g ai ha-1 rate of metamifop exhibited only 8% control of 'Savannah' bermudagrass with 0.67 g of biomass collected, while 'Riviera' was controlled 36% with 0.36 g of biomass collected. Sequential applications of metamifop at 300 to 500 g ai ha-1 completely controlled bermudagrass (100%) 6 WAIT, while a sequential application at 200 g ai ha-1 only controlled bermudagrass 6 to 17% 6 WAIT, regardless of cultivar."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cooper, T., C. Straw, L. L. Beck, and G. M. Henry. 2012. Efficacy of metamifop for the postemergence control of bermudagrass. South. Weed Sci. Soc. Proc. 65:p. 43.
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http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=115
    Last checked: 08/07/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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