Establishing Kleingrass and Bermudagrass Pastures Using Glyphosate and Tebuthiuron

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Abstract
Tebuthiuron and glyphosate were applied at 1.1 and 2.2 kg/ha in 1976 before land preparation for the sprigging of Coastal Bermuda grass [Cynodon dactylon] or seeding of kleingrass [Panicum coloratum] in the claypan region of Texas [USA]. Tebuthiuron at 1.0 kg/ha was re-applied in Feb. 1977 either as the 80% wettable powder spray or as 3.2-mm or 1.6-mm extruded pellets, to a set of plots superimposed across the 1976 plots, Kleingrass top growth production in 1977 was increased by the preplanting treatment with glyphosate in both rates and tebuthiuron at the low rate. Tebuthiuron at 2.2 kg/ha prevented establishment of kleingrass. Bermuda grass cover was significantly increased by a preplanting application of tebuthiuron at 1.1 kg/ha, but was not affected by preplanting application of glyphosate. Tebuthiuron at 2.2 kg/ha had no effect (beneficial or detrimental) on Bermuda grass cover. Crude protein content was higher in kleingrass from plots treated in 1976 with tebuthiuron at 1.1 kg/ha than in kleingrass from the control plots. No differences in grass stands were attributed to formulation of tebuthiuron re-applied in 1977.

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