Full TGIF Record # 27645
Item 1 of 1
Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Taylor, J. M.; Coats, G. E.
Author Affiliation:Department of Plant Pathology and Weed Science, Mississippi State University, Mississippi State, MS
Title:Evaluation of sulfonylurea herbicides on Mississippi highway rights-of-way
Meeting Info.:Little Rock, AR; January 21-22, 1992
Source:Southern Weed Science Society Proceedings. Vol. 45, January 1992, p. 270.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Herbicides; Cynodon; Roadside turf; Paspalum notatum
Abstract/Contents:"The desirable turfgrasses on Mississippi highway rights-of-way are predominantly common bermudagrass [Cynodon dactylon (L.) Pers.] in the north and bahiagrass (Paspalum notatum Fluegge) in the south. Experiments were initiated in 1990 and 1991 to evaluate weed control and turfgrass tolerance to various rates and timings of sulfonylurea herbicides. In the first experiment, five application timings of Oust(R) (sulfometuron) were evaluated on bermudagrass roadside turf. Rates ranged from 0.25 to 2.0 oz product/A in 0.25 oz increments. Applications were made in October, November, December, March, and April. In Grenada County, when evaluated in April, March applications resulted in less density (10-20%) compared to all fall timings (38-58%). When evaluated in May, 1.5 and 2.0 oz/A applied in April resulted in less density compared to the same rates applied in October or November (45% compared to 58-60%). A rate response was not noted within application times. When evaluated in April, control of wild chervil [Anthriscus sylvestris (L.) Hoffmann] and common corn salad [Valerianella locusta (L.) Laterrade] was < 80% with 0.25 oz/A applied in October. Less than 80% control of Carolina geranium (Geranium carolinianum L.) resulted from less than or equal to 0.5 oz/A Oust(R) applied in October. In Holmes County, when rated in April, greater than or equal to 0.75 oz/A Oust(R) applied to bermudagrass in October was required to achieve greater than or equal to 80% control of tall fescue (Festuca arundinacea Schreb.). Oust(R) applied at less than or equal to 0.75 oz/A in November, and all December or March applications, resulted in < 80% control of tall fescue. In another experiment, Oust(R), Escort(R) (metsulfuron), Ace(R) (primisulfuron), and Dacamine(R) (2, 4-D) were applied to both bermudagrass and bahiagrass at 50% resumption of growth following dormancy. The application rates were 0.5, 1.0, or 2.0 oz/A Oust(R) or Escort(R), 2.4, 4.8, or 9.6 oz/A Ace(R), or 32 oz/A Dacamine(R). In Oktibbeha County, all treatments reduced bermudagrass density compared to the control 2 WAT. By 8 WAT, 2.0 oz/A Oust(R), 9.6 oz/A Ace(R) and 32 oz/A Dacamine(R) resulted in less density than the control. The same herbicides applied to bahiagrass in Simpson County resulted in 65 to 70% bahiagrass injury 5 WAT with Escort(R) treatments. Ace(R) applied at 2.4, 4.8 and 9.6 oz/A resulted in less injury than the Escort(R) treatments (25, 33, and 58% respectively), and a rate response to bahiagrass injury was observed with the Ace(R) treatments."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Taylor, J. M., and G. E. Coats. 1992. Evaluation of sulfonylurea herbicides on Mississippi highway rights-of-way. South. Weed Sci. Soc. Proc. 45:p. 270.
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