Full TGIF Record # 16022
Item 1 of 1
Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Jordan, D. L.; Corbin, F. T.
Author Affiliation:A. C. York, and North Carolina State University, Raleigh, N.C., respectively.
Title:Effect of BCH 815 and Nitrogen on Antagonism With Tank Mixes of Sethoxydim and Bentazon.
Meeting Info.:Held: January 18-20, 1988, Tulsa, OK.
Source:Southern Weed Science Society Proceedings. Vol. 41, January 1988, p. 281.
Publishing Information:Nashville, TN: Southern Weed Science Society.
Keywords:TIC Keywords: Sethoxydim; Bentazon; Nitrogen; Ammonium sulfate; Urea-ammonium nitrate; Tank mix; Digitaria sanguinalis
Abstract/Contents:"Reduced annual grass control is commonly observed with tank mixtures of sethoxydim {2-[1-(ethoxyimino)butyl]-5- [2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} plus bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] as compared to the control from sethoxydim alone. Field experiments were conducted in 1987 to determine if the addition of 30% urea ammonium nitrate or ammonium sulfate and/or the substitution of BCH 815 (experimental spray adjuvant, ingredients unknown) for crop oil concentrate affected the antagonism commonly observed on large crabgrass (Digitaria sanguinalis L.) with the tank mixtures of bentazon plus sethoxydim. Treatments included sethoxydim (0.1 or 0.2 kg ai/ha) or tank mixes of sethoxydim plus 1.0 kg ai/ha bentazon applied with 2.2% v/v crop oil concentrate or BCH 815 and with or without either 9.6 L/ha urea ammonium nitrate solution or 2.8 kg/ha ammonium sulfate. Visual ratings were recorded 14 and 28 days after treatment application. Laboratory experiments were conducted to determine the effect of ammonium sulfate and BCH 815 on the absorption of 14C-sethoxydim by large crabgrass. Treatments included 14C-sethoxydim with or without bentazon applied with either crop oil concentrate or BCH 815 and with or without 0.16 molar ammonium sulfate. Four hours after treatment application, plants were sectioned into the following components: treated leaf, upper shoot, lower shoot, and roots. The treated leaf was washed with water and then with chloroform to remove the 14C-label on the leaf surface and in the waxy cuticle, respectively. Plant parts were then homogenized and the 14C extracted and quantitated. In the field experiments, addition of nitrogen solution to sethoxydim with crop oil concentrate or BCH 815 increased large crabgrass control. Tank mixing with sethoxydim resulted in approximately 70% less control with the lower sethoxydim rate and 40% less control with the higher sethoxydim rate. Addition of nitrogen or substitution of BCH 815 for crop oil concentrate overcame most of the antagonism observed in the sethoxydim bentazon tank mixtures; addition of nitrogen plus substitution of BCH 815 for crop oil concentrate completely overcame the antagonism at the higher sethoxydim rate. Laboratory results indicate that the improved control acheived in the field with the addition of nitrogen and BCH 815 to sethoxydim-bentazon tank mixtures was partially due to increased sethoxydim absorption."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Jordan, D. L., and F. T. Corbin. 1988. Effect of BCH 815 and Nitrogen on Antagonism With Tank Mixes of Sethoxydim and Bentazon.. South. Weed Sci. Soc. Proc. 41:p. 281.
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