Full TGIF Record # 11702
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Cargill, L. M.; Montgomery, D. P.; Brede, A. D.
Author Affiliation:Dept. Horticulture & Landscape Architecture, Oklahoma State University, Stillwater, OK.
Title:Herbicide Evaluation for the Selective Control of Silver Bluestem (Andropogon saccharoides) along Oklahoma Highway Rights-of-Way
Meeting Info.:Held: January 14-16, 1985, Houston, TX.
Source:Proceedings of the 38th Southern Weed Science Society. Vol. 38, 1985, p. 357.
Publishing Information:Southern Weed Science Society
Keywords:TIC Keywords: Herbicides; Selectivity; Bothriochloa saccharoides; Roadside turf; Weed control; Cynodon dactylon; Quizalofop; Glyphosate; Sulfometuron; Sulfosate; Terbutryn; Herbicide application; Application rates; Herbicide combinations
Trade Names:Oust
Abstract/Contents:"For the past six years, the Oklahoma Department of Transportation has been actively engaged in a weed control program designed to release common bermudagrass along highway roadsides. As a result of this program, a severe infestatiuon of silver bluestem has occurred and has become a major weed problem statewide along Oklahoma highway rights-of-way. In June 1984, two identical studies at different roadside locations were initiated in north-central Oklahoma. The objectives of these studies were to evaluate the effectiveness of two carrier rates and six herbicides alone and in combinations for the selective control of silver bluestem. The experimental areas were naturally infested with a high population of silver bluestem intermixed with common bermudagrass. The herbicides used were Assure, Roundup, Oust, Rodeo, SC-0224 and Igran. A crop oil was added to the Assure treatments at an equivalent rate of 0.5 percent by volume. roundup alone and in combination treatments with Oust, and Igran had X-77 spreader added at an equivalent rate of 0.5 percent by volume. Herbicides were applied using a handheld CO2 pressurized sprayer. The plots were 5 x 10 ft. (50 sq. ft.) in size. A randomized complete block design with three replications was used. Visual observations of silver bluestem control and bermudagrass phytotoxicity were made at 30, 60 and 90 days after treatments were applied. Results of the two experiments were similar. The best silver bluestem control was obtained with the following treatments: Roundup at 1.5 pts/A in 20 GPA; Roundup at 2.0 pts/A in 20 GPA; Roundup at 2.0 pts/A in 40 GPA; the combination treatments of Roundup plus Oust at 1.5 pts + 2 ox./A in 40 GPA; 2.0 pts. + 2 oz/A in 40 GPA; and SC-0224 at 1 qt/A in 40 GPA. All treatments of Assure and Igran failed to provide acceptable silver bluestem control throughout the duration of both experiments. Also, Rodeo at 1 qt/A in 20 and 40 GPA; Roundup at 0.75 pt and 1 pt/A in 20 GPA; Roundup at 0.75 pt, 1.0 pt and 1.5 pts/A in 40 GPA; and the combination treatments of Roundup plus Oust at 0.75 pt + 2 oz/A, 1.0 pt + 2 oz/A and 1.0 pt + 3 oz/A in 40 GPA did not provide acceptable silver bluestem control. Thirty days after the herbicide treatments were applied, significant bermudagrass phytotoxicity was observed in plots treated with Roundup at 1.5 pts/A or more in 20 or 40 GPA and in all combinations with Oust; both treatments of Rodeo and SC-0224. No bermudagrass phytotoxicity was observed sixty days after the treatments were applied."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cargill, L. M., D. P. Montgomery, and A. D. Brede. 1985. Herbicide Evaluation for the Selective Control of Silver Bluestem (Andropogon saccharoides) along Oklahoma Highway Rights-of-Way. Proc. Meet. South. Weed Sci. Soc. 38:p. 357.
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