Full TGIF Record # 15997
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Johnson, B.; Frans, R. E.
Author Affiliation:Department of Agronomy, University of Arkansas, Fayetteville, AR.
Title:Response of Bermudagrass (Cynodon dactylon) and Johnsongrass (Sorghum halepense) to BAS 517 O2H.
Meeting Info.:Held: January 18-20, 1988, Tulsa, OK.
Source:Southern Weed Science Society Proceedings. Vol. 41, January 1988, p. 102.
Publishing Information:Nashville, TN: Southern Weed Science Society.
Keywords:TIC Keywords: Cynodon dactylon; Sorghum halepense; Postemergence herbicides; Control
Abstract/Contents:"BAS 517 O2H (cycloxydim, proposed ISO) is a new selective postemergence grass herbicide currently being developed by BASF Chemical Co. Cycloxydim effectively controls annual and perennial grasses and has shown excellent tolerance in many broadleaf crops. The objective of this research was to evaluate postemergence control of bermudagrass in cotton and johnsongrass in soybeans with cycloxydim. To evaluate bermudagrass control in cotton (variety 'Stoneville 825') an experiment was established at the Main Experiment Station in Fayetteville, Arkansas on a Captina silt loam soil (27% sand, 52% silt, 21% clay), heavily infested with bermudagrass. The experimental design was a randomized complete block with 4 replications. Cycloxydim was applied to approximately 15-cm bermudagrass stolons at rates of 0.11, 0.17, and 0.2 kg ai/ha. All aplications were followed by a sequential application semi-directed of the same rate, respectively, to 10- to 15-cm bermudagrass stolon regrowth. To evaluate johnsongrass control in soybeans an experiment was established at the Delta Branch Station, Clarkedale, Arkansas on a Sharkey clay (3% sand, 52% silt and 45% clay). Soybeans planted were the 'Centennial' variety and the johnsongrass was a natural heavy infestation. The experimental design was a randomized complete block with 4 replications. Cycloxydim was applied to 15-to 30-cm johnsongrass at rates of 0.11, 0.17, and 0.22 kg ai/ha. All aplications were followed by a sequential application of the same rate, respectively, to 10-to 15-cm johnsongrass regrowth. All cycloxydim treatments in both studies were applied with a crop oil (Agri-Dex) at 2.3 L/ha. Data included visual ratings of crop injury and weed control, and yield data. The initial application of cycloxydim, at all three rates, provided 75 to 80% control of bermudagrass and greater than 90% control of johnsongrass. With the sequential application cycloxydim gave 90-95% control of bermudagrass and greater than 95% control of johnsongrass. No significant crop injury or yield reduction was observed from any rate of cycloxydim. Data also indicate that cycloxydim controls bermudagrass as well as sethoxydim and fluazifop and controls johnsongrass as well as sethoxydim, fluazifop and fenoxaprop."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, B., and R. E. Frans. 1988. Response of Bermudagrass (Cynodon dactylon) and Johnsongrass (Sorghum halepense) to BAS 517 O2H.. South. Weed Sci. Soc. Proc. 41:p. 102.
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