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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Mask, D. B.;
Byrd, J. D. Jr.;
Barnett, J. W. Jr. |
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| Author Affiliation: | Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS |
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| Title: | Will postemergent graminicides and mowing control cogongrass (Imperata cylindrica)? |
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| Section: | Section II: Weed management in turf, pasture, and rangeland
Other records with the "Section II: Weed management in turf, pasture, and rangeland" Section
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| Meeting Info.: | 54th Annual Meeting, Biloxi, Mississippi: January 22-24, 2001 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 54, 2001, p. 63-64. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Postemergence herbicides; Graminicide; Mowing; Mowing frequency; Weed control; Imperata cylindrica; Quizalofop; Sethoxydim; Fluazifop-butyl; Clethodim; Fenoxaprop-ethyl; Visual evaluation; Application rates; Application timing; Application frequency
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| Trade Names: | Assure; Poast; Fusilade; Select; Acclaim; Illoxan |
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| Abstract/Contents: | "Four field studies conducted in Mississippi during the summers of 1999 and 2000 evaluated postemergence graminicides for cogongrass control. Studies were located at Camp Shelby, Preston, Oswalt, and Hurley. Four postemergent graminicides were evaluated at two rates with either nonionic surfactant or crop oil concentrate and with either single or sequential applications. These included: Assure 0.8EC at 20 or 40 fl oz/A, Poast HC 3.5EC at 18 or 36 fl oz/A, Fusilade DX 2EC at 16 or 32 fl oz/A, and Select at 2EC at 8 or 16 fl oz/A. Two additional graminicides were applied once at two rates with nonionic surfactant: Acclaim 1EC at 39 or 78 fl oz/A and Illoxan 3EC at 43 or 85 fl oz/A. The application volume was 13 gallons per acre, and the plot sizes ranged from 6' x 20' at Oswalt, Hurley, and Preston to 7' x 30' at Camp Shelby. Plots were visually rated at 21, 42, 84, and 365 days after treatment. The plots at Oswalt were burned February 24, 2000 and were sprayed on March 3, 2000, and plots at Hurley were mowed June 15, 2000 and sprayed on June 28, 2000. At the other two locations, plots were left untouched. At 21 days after treatment (DAT), Select @ 16 fl oz/A + crop oil concentrate and Poast HC at 36 fl oz/A with sequential applications gave 62% and 65% control, respectively, at Oswalt. However, at all other locations all treatments provided only 22% control or less. At 42 DAT, all of the treatments provided 68% or greater control and at all other locations Select at 16 fl oz/A + crop oil concentrate applied once or twice provided the best control at 10% to 30%. At 84 DAT, all treatments at Oswalt provided 40% to 63% control, but for the other locations, Select at 16 fl oz/A + crop oil concentrate provided the best control at 6% to 25%. All treatments at Camp Shelby and Preston provided 0% control, at 365 DAT. A second field trial was conducted at Oswalt and Waynesboro, to evaluate application timing and applications of graminicides for cogongrass control. The plot sizes were 6' x 20' at Oswalt and 6' x 15' at Waynesboro. The site at Oswalt was burned February 24, 2000 and the site at Waynesboro was burned May 5, 2000. At each of the locations, the last treatment was applied September 20, 2000. Treatments were applied once each month from March at Oswalt or May at Waynesboro through September. In an adjacent area, Select at 16 fl oz/A + coc at 1qt/A was applied sequentially each month from March at Oswalt or May at Waynesboro through September repeated each month. The application volume of these treatments was 40 gallons per acre. The results of this experiment are that Select at 16 fl oz/A + crop oil concentrate applied multiple times, starting early in the summer, provided the best control at the predormancy rating. These plots provided 65% and 38% at 1 month after treatment but control increased to 90% and 90% control at Oswalt and Waynesboro, respectively. However the treatments applied only one time provide control around 30 to 40% one month after treatment and then drop to 0% control at the predormancy rating. A mowing study was also conducted during the summer of 2000, to evaluate mowing as a possible control tatic [tactic] for cogongrass. The mowing frequency included: weekly, biweekly, monthly, bimonthly or no mowing. Two locations were used for this experiment, one near Sturgis and the other in Preston. Plot sizes were 10' x 10' at both locations. At both locations, initial plant densities averaged 85 plants/ft2, but dropped to 22 plants/ft2 for plots mowed weekly and 36 plants/ft2 for plots mowed biweekly. With all of these experiments, except the 1999 experiments, a 365 DAT rating and plant densities will be collected to determine, if these experiments will control cogongrass for up to one year." |
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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):
Mask, D. B., J. D. Jr. Byrd, and J. W. Jr. Barnett. 2001. Will postemergent graminicides and mowing control cogongrass (Imperata cylindrica)?. South. Weed Sci. Soc. Proc. 54:p. 63-64. |
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MSU catalog number: SB 611 .S6 v.54 |
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