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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Baird, J. H.;
Martin, D. L.;
Taliaferro, C. M.;
Anderson, J. A. |
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| Author Affiliation: | Oklahoma State University, Stillwater, OK 74078 |
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| Title: | Tolerance of African bermudagrass ( Cynodon transvaalensis) to herbicides |
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| Meeting Info.: | 50th Annual Meeting, Houston, TX, January 20-22, 1997 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 50, January 1997, p. 74-75. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Abstract/Contents: | "African bermudagrass (Cynodon transvaalensis) is fine-textured, cold hardy turfgrass species currently undergoing breeding and development for use on putting greens and other closely-mowed surfaces. An experiment was conducted in May and August 1995 and in June 1996 in Stillwater, OK to evaluate tolerance of African bermudagrass to commonly-used herbicides. Turf was mowed at 0.476 cm on a Kirkland silt loam. Liquid herbicides were applied in 187 L ha⁻^D] 1 of water using a CO²-powered ground sprayer. Treatments were arranged in a randomized complete block design with three replications and individual plots measured 1.5 m x 3.7 m. Herbicides, formulations, and rates (kg ha⁻¹) applied were dithiopyr EC (0.56, 1.12), halosulfuron WP (0.034, 0.068), oxadiazon G (3.36), bensulide G (6.7, 13.4) + oxadiazon G (1.68, 3.36), and 2, 4-D amine (0.67, 1.34) + mecoprop amine (0.34, 0.68) + dicamba amine (0.067, 0.134). Analysis of variance of data from the May 1995 and June 1996 experiments revealed that there was no difference in results between the two experiments; consequently, means of the two experiments were combined for determining treatment effects (alpha < 0.05). These data hereafter will be reffered to as the spring experiments and data from the August 1995 experiment will be referred as the summer experiment. In the spring experiments, greatest turf injury (0 to 100% scale) at 7 days after treatment (DAT) resulted from triclopyr applied at both the 1 x (60%) and 2 x (84%) rates. In addition, 2, 4-D + mecoprop + dicamba caused significant turf injury at both the 1 x (29%) and 2 x (48%) rates 7 DAT. Injury from triclopyr and 2, 4-D, + mecoprop + dicamba persisited up to or beyond 35 DAT. Upon recovery, however, turf treated with these herbicides appeared darker green in color. No other treatments caused significant turf injury except for the 2 x rate of dithiopyr (<15%) and oxadiazon (<10%). In the summer experiment, warmer temperatures resulted in greater turf injury caused by triclopyr (<88%) and 2, 4-D + mecoprop + dicamba (<66%). Furthermore, significant turf injury was caused by the 1x (<38%) and 2x (<46%) rates of dithiopyr, the 1x (<21%) and 2x (<34%) rates of prodiamine, and oxadiazon (<16%). This experiment demonstrated that MSMA, dichlofop, halosulfuron, and besulide + oxadiazon were safe to apply on African bermudagrass at rates up to twice the normal label recommendations. African bermudagrass was sensitive to oxadiazon, dithiopyr, and prodiamine, especially when applied during the summer. Finally, triclopyr and 2, 4-D + mecoprop + dicamba applied using the rates and formulations in this experiment caused unacceptable injury to African bermudagrass." |
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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):
Baird, J. H., D. L. Martin, C. M. Taliaferro, and J. A. Anderson. 1997. Tolerance of African bermudagrass ( Cynodon transvaalensis) to herbicides. South. Weed Sci. Soc. Proc. 50:p. 74-75. |
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